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Old 10-14-2009, 03:13 AM   #1
HarryT
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Bug - with book or with Sony ePub renderer?

As many readers of this forum will know, I have converted all of Dickens' novels into ePub format. I've discovered, however, that one of them (attached below) exhibits a VERY annoying bug on the Sony PRS-600 - it randomly "skips over" pages.

If you have a Sony Reader, try this:

1. Load the book ("Miscellaneous Papers" by Charles Dickens).
2. Set the text size to "Medium".
3. Go to the chapter called "Capital Punishment"

and page through it. What I find is that 7 "screens" into it (the page which ends with the text "With the entrance of the Punishment into his thoughts,") it will skip over a page and display the next page (starting "about her") having missed out a complete page between the two. There are several other points in this chapter at which it has problems, too; I have even had it get entirely "stuck" and just display the same page over and over when you press the "Next Page" key. These issues arise right through this book.

On any other font size except "Medium" the book displays correctly. On the PC ADE Reader, and on the CyBook Opus the book displays correctly. On the Sony eBook Library program on the PC it displays correctly. I am coming to the conclusion that this is a bug in the Sony ADE renderer.

This is the ONLY book that I've created which seems to have this problem. Would one of the ePub experts among us be kind enough to have a quick look at the book and see if there is anything obviously wrong with it?

Thanks!
Attached Files
File Type: epub Miscellaneous Papers.epub (505.9 KB, 117 views)

Last edited by HarryT; 10-14-2009 at 03:17 AM.
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Old 10-14-2009, 05:51 AM   #2
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Seems to be OK on a 505 - it goes from 'With the entrance ...' at the bottom of the page to '.. the shadow of the fatal beam' at the top of the next.
That's on Medium. Small and Large are OK too.

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Old 10-14-2009, 07:19 AM   #3
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Seems to be OK on a 505 - it goes from 'With the entrance ...' at the bottom of the page to '.. the shadow of the fatal beam' at the top of the next.
That's on Medium. Small and Large are OK too.

bob
Thanks, Bob - that's what it should do.

For me, though, the behavior on the PRS-600 is absolutely consistent - it skips over the "shadow of the fatal beam" page every time.

Is there anyone else with a PRS-600 who could try it and see if they get the same thing?

Last edited by HarryT; 10-14-2009 at 07:35 AM.
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Old 10-14-2009, 07:52 AM   #4
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I don't have a 600, but I'm interested in hearing if there are differences. You may have found a software bug...
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Old 10-14-2009, 07:56 AM   #5
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It's either a problem with the book, or a bug in the PRS-600, and I'm inclined to think it's the latter, given that it behaves correctly on all the other devices I've tried it with.
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Old 10-14-2009, 08:08 AM   #6
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I just paged though pages of that chapter with my Pocket Pro at a couple of mediumish font sizes and it seemed to be fine. I did not specifically look/find the particular passage you indicated but didn't see any "missing" pages as best I could tell.
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Old 10-14-2009, 08:28 AM   #7
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I'm away from my usual machine, so I don't have all my tools to hand. But on a Windows XP machine, changing it to .zip and trying to Extract All using the built-in de-zipper gives two mysterious warnings about password protected files. The file names given seem to be gibberish. Perhaps it's a (slightly) corrupted zip file?

The only weird thing is that there seems to be four odd characters at the start of every paragraph. As I said, I'm not at my usual machine, so I can't tell what these are exactly. Perhaps they're fixed width spaces to give an indent. In which case - ugh!



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Would one of the ePub experts among us be kind enough to have a quick look at the book and see if there is anything obviously wrong with it?

Thanks!
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Old 10-14-2009, 08:40 AM   #8
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Quote:
Originally Posted by pdurrant View Post
I'm away from my usual machine, so I don't have all my tools to hand. But on a Windows XP machine, changing it to .zip and trying to Extract All using the built-in de-zipper gives two mysterious warnings about password protected files. The file names given seem to be gibberish. Perhaps it's a (slightly) corrupted zip file?
I've just done the same using "WinZip" and it works fine - no warnings, and the file contents are exactly what one would expect.

Quote:
The only weird thing is that there seems to be four odd characters at the start of every paragraph. As I said, I'm not at my usual machine, so I can't tell what these are exactly. Perhaps they're fixed width spaces to give an indent. In which case - ugh!
Yes, those are four non-breaking spaces, courtesy of BD, used as a paragraph indent. Ugh! indeed .
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Old 10-14-2009, 09:24 AM   #9
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IYes, those are four non-breaking spaces, courtesy of BD, used as a paragraph indent. Ugh! indeed .
That's easy to fix. Just remove them. Then set a CSS style for <p> and remember to fix the paragraphs that have no indent separately. Just look at the Agatha Christie book I converted from Mobipocket to ePub. I had to fix the 4 non-breaking spaces.
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Old 10-14-2009, 09:41 AM   #10
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Looking at the html files, after the heading 'Capital punishment': CAPITAL PUNISHMENT</span></span></span></span></span></span></span></span></div>
</a></span></span></span></span>
****</div>
there are 15 consecutive closures. Random looks at similar points in e.g. David Copperfield or Edwin Drood seem to have only half-a-dozen or so.
I wonder if this has somehow bumped up against an internal limit.
This is a chapter heading in DC: IV. I Fall Into Disgrace</span></span></div>
</a>
</span>

Could of course be a complete coincidence.

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Old 10-14-2009, 10:36 AM   #11
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I don't know what the issue is, but I've made a few edits to this and here is the new version. Give it a try and let us know how it works. I did fix the 4 spaces as an indent and fixed the book title page that was split in two.
Attached Files
File Type: epub Miscellaneous Papers.epub (504.5 KB, 98 views)
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Old 10-14-2009, 11:40 AM   #12
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I think the problem shows up also with the Sony Ebook Library - if I load the book, switch to Medium font on the first page and then slowly page forward using the mouse wheel, I noticed several times in a few pages where the bottom of one page isn't logically followed at the top of the next. Also it comes to pages where it won't roll forward any more, although it will go back sometimes.
Smart money is on a problem with the file, I think.

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Old 10-14-2009, 01:28 PM   #13
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More information:

I have replaced the titles, to remove the long string of </div>s previously mentioned (which were the result of multiple edits). The behaviour is completely unchanged. I have also confirmed that the bug is reproducable in Sony eBook Library, as mentioned.

Bob - yes, clearly there is some "interaction" between the book and the PRS-600 that's causing the problem, but I can't see anything in this book that's any different to the others I've created, which all work fine. There's obviously something about it that the 600 doesn't like, but what? Windows Desktop ADE, the Opus, and apparently even the PRS-505 all display it correctly.

If anyone has any further thoughts on what the cause of this problem might be, they would be very welcome!

Last edited by HarryT; 10-14-2009 at 01:57 PM.
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Old 10-14-2009, 02:18 PM   #14
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I've decided to recreate this book, from the original sources, one item at a time and see if I can pin-point exactly where it goes wrong. This is really bugging me now!
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Old 10-14-2009, 03:16 PM   #15
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I've decided to recreate this book, from the original sources, one item at a time and see if I can pin-point exactly where it goes wrong. This is really bugging me now!


I'm sure you'll get to the bottom of it. It may very well be some strange interaction or bug in the Sony Software that is only there for certain tags or arrangements or tags etc etc etc....

Will be interested in what you discover.
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