the open close icon on the right side of the foldable panes title bar does not display any more. It still is possible to open/close the foldable, if you manage to click in the area where the icon should be.
it looks like the image is missing. But I checked the directories and the image is there. It does work on the machine of my collegue though.
It occured with the version from yesterday 20080828 which be both have installed.
in my image directory the image file is named
fodablepanedefaulticon.png
with missing 'l'.
In Antje's image directory there is a second file with correct spelling.
When I renamed the image file, it works again.
You are right. It was renamed by accident. We never noticed because our demo applications always received an addon-copy of the webappaddons directory, so the right icon was available "by history".