bug in workflow window

[bot]

I somtimes use the workflow window to work on pictures, without using a workflow (PWP v6.0.9; 64 bit). I noticed a bug. This bug does always show up, but most of the time. So try the following again if it does not happen the first time.
- open the workflow window and add some thumbnails
- open a picture and put the close-button on top of a thumbnail
- put the mouse pointer on the close-button of the activated picture, but do not click. Wait a second. The thumbnail under the pointer and close-button enlarges.
- Click once on the close-button. The picture does not close. The thumbnail is activated.
- Double click on the close-button. The picture does not close, but instead the picture of the thumbnail underneath opens and is displayed on top of the first picture.
- Close the second picture and put the mouse pointer on the top border of the first picture. Every thumbnail can be activated by clicking once and openend by double clicking on the top border.

[Dieter Mayr]

I can confirm this for the 32-bit version, too.
The whole title bar seems to be transparent (not optically but for mouse clicks).