option-delete bug on OS X

Hey, so formalities out of the way:

version: 1.12.2, binary download

os: OS X 10.6.6

So in a typical text window, "option-delete" performs a "delete previous word".  In the query browser window, to perform a "delete previous word" you need to use "control-delete".  But if you accidentally press "option-delete" as I often do, it seems to do a "undo last action", whatever that was, typing, deleting, whatever.  But redo does not recover the undo action, nor does undo, sometimes requiring much retyping of queries.

It would be nice if the text window behaved as expected on OS X with "option-delete" performing the "delete previous word" action.  More importantly though would be that it does not do the mysterious "undo last action".

Thanks!

-Matt.