ZFS on OS X and Hanging Updaters

I was finishing off my taxes today, and while trying to apply the updater for TaxCut the updater would just hang. It'd completely max out one core of my MBP, and not ever do anything. Finally, in a moment of desperation, I fired up Instruments and started sampling it, and it was getting stuck in a Carbon routine about getting filesystem info. Unmounting my ZFS partition and trying the updater again caused it to go through instantly, with no issues.

Instruments is Made. Of. Awesome.