Try creating a new block and see what happens. Also try the refresh/recreate views under GXL when you r-click in a view. Maybe zooming in or out. If that doesn't work than it may be a graphics problem.
Windows XP SP3 Intel Dual Core CPU: E5200 @ 2.5GHz 4.00GB DDR3 Ram ASUS P5G41T-M LX PCIE x16 GeForce GTS 450 1Gb SB Audigy 4 Spyware Doctor with AntiVirus
