dagger I think you'd have to post in the "mouse sluggish" topic, and go from there. Whatever the issue is, its obviously system-based and a different kext may solve it for you.
Mouse out of control after install NVEnabler or iAtkos Install Problem-Mouse is Sketch- No Answers on google?? maybe?

srs5694 Did you have the same problem with a different version of SL? i.e. one that you manually installed from Leo 10.5.8? Its hard to say otherwise that its the distro causing this issue or whether your video card is just not (currently) supported. Let me know what comes of it, because I am curious.

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System: M2N Plus SLI, Hazard 10.6.2
Video: NVIDIA GeForce 9600 (512MB- NVEnabler)
Processor: AMD Athlon Dual Core 6000+ ~3.2Ghz
Ram: 4GB (800mhz DDR2); Audio : Realtek (Voodoo HDA)
Disk 0 - 500 GB WDC (SATA; Snow 10.6.2- LegacySata)
Disk 4 - DVD-DL (Sata)
Network: Nforce 5 (RTL8169)