sticky mouse with second monitor attached
My cursor sticks (freezes momentarily every 4 seconds) when I have a second monitor attached
anybody know how to fix this? LG 17" causes that problem while Apple Cinema display does not
I really need that second monitor. Help.

Hardware Overview:

Model Name: iMac
Model Identifier: iMac11,1
Processor Name: Intel Core i7
Processor Speed: 2.8 GHz
Number Of Processors: 1
Total Number Of Cores: 4
L2 Cache (per core): 256 KB
L3 Cache: 8 MB
Memory: 8 GB
Processor Interconnect Speed: 4.8 GT/s