I understand the phenominon...
it's happined to me twice but usualy goes away after restarting maya....
i've only seen this glitch in 4.5
but maybe it's history
im sorry i could'nt help but im not a pro only a newbee!?
MY MAYA SYSTEM
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1.7 Ghz Intel Pentium
3.0 GB of RAM DDR 333
128 MB NVIDIA Ti 4600
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I know it's not a realy great system
but it gets the job done....