One last thing... every time a new update gets released, I try and cull all of the unofficial changes into a log since there is no official changelog. These might help you if you've missed an update or two or want to wait to see what's been addressed...
Kindle DX Changelogs
https://www.mobileread.com/forums/showthread.php?t=48809
Kindle 2 Changelogs
https://www.mobileread.com/forums/sho...479#post397479