I know that this bug has been around for a long time, since whenever the 
list-pane highlighting was added. (sometime during 3.1)

On a related note, I've always been annoyed by the fact that list panes 
are highlighted when they have focus, but text panes are not.  That 
would be a useful enhancement to have.

- Doug Way


Serge Stinckwich wrote:

>Hi all, 
>
>There is still an annoying small redraw bug with SystemBrowser panes.
>
>How it appears : 
>- open a SystemBrowser
>- move the mouse arrow inside the class category pane in order to have
>the focus. A grey thick gray rectangle should appear.
>- move slowly the mouse upward until the arrow leave the SystemBrowser.
>- then move the arrow down slowly until the  bottom of the arrow touch
>the grey rectangle,
>- suddently the grey rectangle is damage a bit with a white thick line.
>It stay damaged if you move the arrow outside the SystemBrowser. The
>rectangle is repaired if you move the arrow inside the first pane.
>
>The problem is the same with other SystemBrowser pane.
>
>I have attached a small screenshot of the redraw problem.
>I'm using Squeak 3.6beta-5373 under Gnu/Linux.
>
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