Steps to reproduce:
1) Open Drosera, attach to WebKit.
2) Browse to google.com
3) Switch to Drosera, click on the function popup and select "sf()"
4) Click in the source view, and hit the Down arrow on your keyboard to scroll down.
Source view scrolls down.
Function popup menu appears.
Created attachment 11373 [details]
Should fix this issue
It may appear, in testing this, that it breaks the function popup. This appears to be another bug that existed before the patch, which I will file in a moment if it hasn't already been filed. It can be worked around by clicking exactly where the value in the popup menu will be when it shows.
Landed in r17600.
Closing since Drosera has been replaced by the new Web Inspector debugger. Moving to the New Bugs component so the Drosera component can be closed and removed.