Firefox 0.10: cursor keys do not work

[Sebastian Schulze Struchtrup]

>>whenever I edit a text field in an HTML form, the cursor keys do not 
>>move the cursor.
>>
>>What works is Ctrl-Cursor Key to move the cursor word by word.
>>    
>>
>
><me too>
>
me too

plus the following:

* type ahead find does work
* modifying my settings thru Edit->Preferences does not work (unable to 
save the changed settings)
  this was already reported by someone else in another thread