HS30 RAF(RAW) and Lightroom 4 performance
I used to have the same thing occur with Lightroom 3 and Fuji RAF files. Once they had ACR6 support the issue went away.
If you have Lightroom 4 beta it may not yet have all the correct profiles for the HS series RAF files. The Full version along with the updates hopefully will. I'll know more shortly as I'm about to test LR 4.
Love dat Fuji
Pentax K1000, Pentax sf7, Pentax zx-50