attachment_fu (with rmagick) on windows not working

man, i had a heck of a time getting attachment_fu (using rmagick) on windows working tonight. let me just start with this: if you're having problems, just reboot. it would have saved me an hour.

i followed all the instructions and fixed all the hacks, yet for some reason thumbnails were not generating and the height and width was not being saved. there are lots and lots of articles out there on these topics. most of them discuss how the size isn't being saved, but in my case the size was being saved.

how'd fix it: i rebooted the machine and it worked.