Plus! has a major mirroring bug when showing a window in RTL mode and having CustomLook elements in it. Then, strange results can occur with both ImageElements and keyboard focus. To illustrate it a bit, have a quick look at this tiny screenshot:
Of course you'll want to confirm this bug. To make it easy for you, I created a demo script showing nothing but this bug. Please make sure you remove this script or at least disable it, after your tests, else it will open its demo window on each initialization. Where is the demo script? Simple: look some centimeters below.
What do you think? Confirmed? Any way to solve this problem?