Zubaz is right, this is a great way to report a bug, but I can't duplicate it (and will pass if offered).
Maybe you should report your system info and if you can, take a look at cpu/RAM/swf file usage....if these are ok, maybe the cycling order/rate is off...?
Also, see if this happens using a different skin...
As I said, I've already tried it without Windowblinds running, so I'm pretty sure that isn't the problem. I have an Intel Dual Core 2.53ghz processor with 2gb of DDR RAM and a 512mb NVidia GeForce video card.
I tried it again just now after exiting everything I could including a few processes, but I got the same result as before. The glitch doen't seem to hurt anything performance-wise, but it does get annoying if I leave my fences unlocked.
About the cycling order/rate, what is it exactly and how do I check it?