resize-button in tab changes color sometimes

[jdawin]

Under certain conditions, the resize- and close-buttons in the tab change their color on clicking. To reproduze this behaviour do this:

1. open a folder, say "Haiku" from the Desktop
2. open another folder inside the first one, say "beos"
3. open yet another inside this second folder, say "etc"
4. now activate the "Haiku"-window, and maximize it, if it isn't already
5. make it smaller by dragging the bottom-right edge
6. scroll one the scrollbars
7. move the window around
8. click on the resize-button. Now, or after a few more clicks on the resize-button

the button should change its color to dark blue or grey, which is unexpected. To see the close-button change its color, click on it without releasing the mouse-button

The effect is quite unpredictable. I could not figure out a rule for which color comes up or which window needs how many clicks on resize to show the effect. But the above method worked quite reliably for me.

[jdawin]

the resize-button turned blue

[j_freeman]

I've seen this from time to time as well.

[stippi]

The button rendering is done using bitmaps since some time, so this bug, although it wasn't truly fixed, should not be reproducible anymore.