Ok, this time I think I found a real bug.
In the Action Editor on the Categories tap. If you press F2(Validate), the categories in the subject tab shift to the left so that you cannot see the little arrows to open up the trees. Now you can easily just scroll it back using the scroll bar on the bottom, but it is a little annoying.
Attached is a screen shot of what it does.
jBliss 1.5.3 Beta 7
Java version: 1.6.0_03 from Sun Microsystems Inc.
OS: Linux Ubuntu 7.10 Gutsy Gibbon
Computer: Dell Dimension 3000
Ram: 512 MB
Hdd: 40GB, 40GB
Processor: 2.4 GHz Intel Celeron
Video: Integrated Intel Video Card