Hi there, I was just about to write a post requesting help or even a support ticket about the scrolling ticker module k2newsscroller not working with .htaccess enabled. The scroller would only display the item titles, but it wouldn't scroll through them (like a stock ticker) if i enabled the .htaccess file. I figured I might as well go ahead and upgrade 1st and that seemed to have fixed it!
I am unable to use the Akeeba auto updater on my site due to some weird redirection symlinks in the FTP home directory (although I can use the non FTP standard Joomla! installer for components) so I have to do all the upgrades manually.
It seems ok, but I will continue to monitor it.
Also, have you considered a sticky thread with RewriteRules for popular components (K2, JomSocial, etc)?