As a UK customer, I looked for KBAB on amazon.co.uk. I found 3 postings/versions of which the review was on an unspecified version (presumably version 1):
http://www.amazon.co.uk/Kindle-Bug-A.../dp/B004D4ZQLC
The review was dated 10th Dec 2010 - worryingly recent given that there seems to be no indications in either of the other versions:
http://www.amazon.co.uk/Kindle-Bug-App-Browser-applications/dp/B004E3XUA6 or
http://www.amazon.co.uk/Kindle-Bug-A.../dp/B004GB0JPU
That a known problem was corrected.
Incidentally, the amazon.co.uk postings seem to have equivalents on amazon.com including the same review on (presumably) version 1.