When the reading position is in the middle of a chapter and switching between landscape and portrait (by rotating your iThing), Marvin 3 does not retain the current reading position. Landscape seems to be several screens behind portrait. It may be that landscape is exactly one page behind portrait, and this means it is several screens behind (where one page = several screens).
I don't remember this being a problem with Marvin 2.
This behaviour was mentioned before in this forum (
https://www.mobileread.com/forums/sho...43&postcount=4) but was buried in another thread, so I thought I would raise it again in a new thread, to hopefully get some feedback from other Marvin users and Kris.