What operating system are u using? I get a similar thing on Windows 2000 here at work i.e. NT based, but in BOTH versions of VMA (2.1 & 3.0). In my case, it's not an entire strip - but 2 wedges or 'notches' near the equator that are blacked out. It may have more to do with your video driver files than with the software.
I didn't have this problem in version 2.1 on my home PC under WinXP. I'll try the new 3.0 on XP & see if it happens there.
Try upgrading your video driver, or tweaking the driver/GL settings etc.
It's not necessarily a bug in the software (yet!)
Cheers, Fred....
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