Over at the ereader blog there is a video review of the T68 running the Kindle app:
http://blog.the-ebook-reader.com/201...-review-video/
In the comments, a fix was suggested that apparently helps:
https://play.google.com/store/apps/d...ookclearscreen
I would also suggest trying one of the older kindle apps that work on the Sony T1.
2.05 should work.
http://www.freewarelovers.com/android/app/kindle