[FREE] MAXIMIZE window BUG

I have my WINDOWS TOOLBAR located in the LEFT part of my screen:
[[] MY SCREEN]

I have open the AVAST result scan windows. Click on the maximize button…

The right corner of the scan window does too far to right out of screen, like this
[_[…]

What is your system?

I don’t see this bug on my system.
Windows XP SP3, Avast IS, 1024x600

What OS/SP ?
What are your screen-resolution settings ?