Originally Posted by tompe
No, they are not. Going forward 100 pages and then backward 100 pages will not get you back to the position you started with.
There are actually two different issues. The first is that, as Tommy says, going backwards through the book does not precisely reproduce the page breaks of going forwards. The second - more significant - issue, is that using the "goto page x" feature will take you to a different - sometimes quite radically different - page than you'll reach if you simple go through the book a page at a time to get to "page x". Doing a "goto page x" will always take you to the same
place (for a given "x"), but if won't be the same page that's numbered "x" by reading the book a page at a time.
These bugs exist in all versions of the MobiPocket Reader. They don't matter if you just want to read a book from start to finish, but they can be significant if you want to jump around in a book. The best thing to do is to use bookmarks - they do work reliably.