Hi,
New (possible) bug in 3.16.0 :
I am using Kobo Glo HD with 3.16.0 firmware installed today.
When opening KEPUB file which is converted from cbz,
after first page(cover), it goes black with/without white border.
I can call menu, and can go back and forth, only the contents are gone black.
I don't think it is anything related with JPEG rendering engine,
because I can read normally the cbz file which was the original source for problematic KEPUB.
I can reproduce the situation 100% by converting cbz into kepub with calibre.
And those files made no problem with older firmware.
However, there are two points you might want to consider.
Firstly, I use calibre on my Korean version of Windows 7.
Maybe there can be some issues with code-page, encoding, or character-set of the original cbz file. To prevent any problem, I do not to use any Korean character file name for my cbz, regardless cbz file with Korean file name actually makes no problem.
But, maybe, there can be tiny possibility that this problem is originated from Korean version of Windows.
Secondly, I applied some optional tweak to add .fxl.kepub.epub extension when calibre transfers files to Kobo.
I disabled the tweak, but it shows same results, black contents.
Changing file name also doesn't work either.
I am looking for someone who is brave enough to reproduce this with their kobo reader, and confirm whether it is because my own problem, or some new bug with the new firmware.
Thanks.