I have been running into issue with Webkit NB r166639 under Mac OS X 10.8.5. Very reproducible and annoying :). I have attached a simple text case of a TEXTAREA field. 1) With Webkit NB r166639, open the test case ( textarea.html ) 2) Put focus in the TEXTAREA field and type "whh". This should display a auto-suggest popup of "why" 3) Now, press the return key to attempt to dismiss this popup. Crash occurs. See attachment.
Created attachment 228415 [details] TEXTAREA
Created attachment 228416 [details] crash log
<rdar://problem/16505710>