I've been experiencing assorted bugs with Preview, primarily searching through certain PDFs bring the entire system down (beachball, command-option-escape does nothing). Something similar occurs when using certain screensavers. Not sure if these are related or not. Anyone else experiencing this?

zephyroth rev1 (security /quicktime updates, patched with marvin's)
64 x2 6000+
4gb
m2n-sli deluxe (nforce4, using the medevil kext from rev2)
nvidia 8600gts (zephyroth's universal installer)