Join Date: Dec 2008
Location: Perth, Australia
Device: Sony PRS-650, Sony PRS-T3, Kindle 3, iPad2, Nexus7v2
Might be the recent ebook that is a culprit. When the autoplay file explorer window pops up, remove the ebook and then disconnect properly. Hopefully when it recompiles the ebook contents, it will load correctly for you.
It might then pay to run the ebook through calibre and convert it epub-epub to see if the bad niggles are removed.