Created attachment 420466 [details]
screenshot of the fields with the white line around
There is an ugly polish bug on the linux version of Firefox (Ubuntu Karmic), afaik, it affects all Firefox versions. A white line surounds both the url and search fields in the navigation toolbar, if you move your mouse on top of these fields, these widgets are redrawn and the white line disappears.
I am attaching a screenshot and video to display the problem
Created attachment 420467 [details]
video showing how the fields become normal when you move your mouse over them
I see the bug with all versions of Firefox since 3.0
this problem dispareared for me with Ubuntu 10.04, marking WFM