attachment_fu, better feedback on errors

Hi everyone!

I'm using attachment_fu to attach an image to a property model.
Sometimes the image uploads, but sometimes it fails. How do i get a
better error when it fails? dev.log doesn't say much. See my method
code here: http://pastie.caboo.se/71753 .

Thank you

plus, the more images i've uploaded the more likely it is to fail. i
tried uploading up to 6 and couldn't anymore. then I deleted some and
got a higher rate of success. btw, i'm using the plugin in conjuction
with Rmagick