Hi, Thanks for the great plugin (and acts_as_attachment),
I would like to submit a fix I did for a clients rails 1.2.6 application. This restores compatibility whilst still leaving the behaviour the same for Rails 2.* onwards (Ignore mass assignment restrictions when creating thumbnails).
The breakage occurred in commit 9d75401
Rails 1.2.6 compatibility fix (guard_attributes on thumb.attributes= …
…introduced in Rails 2.*)