hi,
 
check out this screenshot: http://img39.imageshack.us/img39/7740/unbenannthur.jpg
 
i have a feeling that Vista Inspirat 2 cause these lines, but how can I remove them?
 
they show up straight after booting, changing the background doesnt help
 
edit: ..oh nvm, seems like its a known bug without a fix

I think disabling Y'z shadow/True Transparency will fix the problem but am not sure.

Yes, I had the same problem earlier. It's because of Y'z shadow. It means that some background program is running, like an update perhaps. Instead of hiding the application properly, the application developers just reduced its transparency to 0. That way, you cannot see it, but Y'z shadow still detects it and produces a shadow. It's a poor programming practice, it usually also ends up taking more memory, but what can you do about it?

My suggestion is to either run Task Manager, and find and terminate these programs, or add them to the Y'z shadow exception list. That's what worked for me.

By the way, the programs that were causing this problem for me were Adobe update and MSN Live Messenger.

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One forum at a time.

I had the same problem with Comodo Firewall, even though it was minimized it still showed a shadow like you have it in the pic. The only way it worked for me was to was to disable Y shadow.
 
Will try again, maybe with an update to Comodo it might work.

You can add stuff to the Y'z Shadow exception list