Ok, so I haven't been using my PB360 much (have to finish the library books before they're overdue), but did notice something odd. I was using the reader to kill time before a concert, and I choose a DRMed ePub. While reading the book, holding down the select/ok button didn't bring up the book menu as usual, and if I left the book, it didn't remember where I was when I went back. Luckily, holding down the page forward button seemed to cause it to jump forward in increments of 10 pages.
I'm hesitant to try another book at the moment until I finish this one

Has anyone else seen this before? Is it because of the DRM, or the ePub, or something else?