i had problems with my prs-t1 (using the latest somehow 1.07.x) software
- dictionary was not functioning in calibre converted epubs
- it started to close books
- it started to not remember the pages on which i was (had to -restart every opened book from page 1).
could succesfully downgrade (1.05 somthing) thanks to this excellent post here
https://www.mobileread.com/forums/sh...4&postcount=18
it took some hours to figure it out, but was quite doable.
now my problems are solved!
very happy + big thanks to the author of the post above!