http://blenderartists.org/forum/showthread.php?t=166992

 Quote from popski
"From my experiences it's not easy at all to write an USEFUL bug report. Usually there are some system issues or simply users lack of knowledge...

This thread is meant as a FILTER for a REAL Blender BUGS!

You found a bug in Blender? Report it here!
You are not sure if it's a bug? Report it here!
You still don't know how to make a useful bug report? Ask here!
You think it's a bug and not a feature? Say it here!
You found some ridiculous bug report in a tracker? Paste it here! (this will make this thread even more fun)
You found a bug in my post? Say it here!
You love some bug? Say it here too!

So, you can post all stuff related to a Blender bugs here.
People can test a reports on a different systems, with a different configurations and we'll try to figure it out if it's a real bug or not, before it goes to a bug tracker.

Let's keep busy our beloved coders with a real issues and a quality reports!"

So if you run across anything...

Okay, I got some easily.

I must be a Blender 2.5 Beta issue because I don't get the same 2.49 issues I posted in another thread.

I'm running Windows 7 with a Optical mouse (and scroll wheel).
As you can see in the attached images, there is a copycat bug. Basically, it taking the very top panel and coping the rest of the program's visuals within it. Scrolling (with the wheel) only causes the window to enlarge. As does when I tryto re-size a panel.

The program seems to running MUCH faster then 2.49. But this bug is a big one. It interferes with saving and other features. Making it impossible to get to them. In the bottom image you see what happens when I opened a old file. Different interface layout but the bug is still at the top.

 Wish I had the means to record what was happening. But at the moment I can't. :(
But I do enjoy the speed of the program.

http://img268.imageshack.us/img268/8379/blend25betaerrors.jpg

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EDIT-1

Also can't get the scroll wheel movements to work. (Shift + Wheel & Ctrl + Wheel)
You know, the same ones found in 2.49

In the Preferences setup...click "System" tab...in the "Window Draw Method"...try the different settings, "Triple Buffer" "Overlap" "Full".
Triple buffer is a new setting, so may be your video card can not handle it.
I'm seeing many issues with mobo video chip usage. But that's with any app.

I think the mouse problem is due to not getting all of the mouse commands finished yet.
I suspect that this will be put in very soon. Development is picking up.
Remember this will not be Beta until sometime in Oct.

Also, with not many people using Win7 yet, I think that issues may linger just a bit longer than other OS's.

Hope this helps.

Edit: to add, turn off any "Visual Effects" in Windows also, this is a problem with many apps I'm seeing.

Placed it on "Full" and it worked. WOOT!

Thanks Tons. ;)

No  problem...glad to be of help.

Happy Blendering