SSIS (BIDS) GUI not displaying the borders of the tasks

Recently came across an interesting one where the SSIS GUI was not showing the borders of tasks inside any package. We can see the text was being displayed. Also, started noticing this after installing SP1 on VS.NET 2005.

I did several steps to confirm that only SSIS GUI is affected.
The general C# and Vb.NET Windows forms were all working fine, MS word showed the drawings correctly.
Tried zoom-in (view size to 50%) but still the borders were not displayed.

The root cause of the issue was that the display drivers were of old build. Once we upgraded the video card drivers to the latest and greatest, the problem went away. The reason behing this might be that SSIS GUI is heavier that others and required stronger graphics driver version for effective UI drawing and re-printing.