What types of files are you converting them into?
I myself have only put 2 episodes onto the device because most of mine are avi
and i cant be bothered to convert them, but the 2 iv tried are both .wmv and work fine.
Why geeks like computers: unzip, strip, touch, finger, grep, mount, fsck, more, yes,fsck,fsck,fsck,umount, sleep.
HTC One Silver 32gb 
Nook HD+ 9 [CM10]
HTC Sensation [Vodafone, running cm10]
HTC Desire [T-mobile , Rooted, RCMixHD Rom]
HTC Diamond [Using Android 1.6 and windows 6.1]