OK had a little mess around with formats
~700 page book in a 1.6mb html
1.3mb txt
and a 0.6mb ePUB
also had a random pdf of something else i had lying around
the epub loaded once, went to page 150, put a bookmark, went back to library and it reset
reset when loading the book again every time afterwards
html, txt and pdf files all loaded fine (although slower than the epub), navigated to page 150, set bookmark, exited to library
went back in, jumped to bookmark, exited to library again
all fine
so its very definately related to the epub format
although its kinda odd that it opens it just fine once but not again
hope they fix this soon tbh, epub is my prefered format :|
Also doesnt seem to happen with smaller ePUB files, i have a 40kb ePUB book on there too which loads fine (and much faster than html/txt) everytime
will try and find the threshold for crashing
