Imported rules "disappear" in Hazel 3.3 on Yosemite

I just upgraded my system to Yosemite (a fresh nuke-and-pave install, *not* an in-place upgrade from 10.9), and noticed that when I reimport some of the rules I previously exported from Hazel 3.3 on my pre-Yosemite Mavericks setup, that the rules disappear from the selected folder when I close the Hazel prefpane, and open it up again later.
What's puzzling is that this isn't happening with another set of rules I imported in the very same manner. It's only happening with a particular ruleset.
If it helps, here is the ruleset that is giving me these problems:
http://d.pr/f/10ybi/592LFV6j
These rules are applied to a folder called "_CAMERA UPLOADS" in my Dropbox folder.
Any ideas what's going on here?
What's puzzling is that this isn't happening with another set of rules I imported in the very same manner. It's only happening with a particular ruleset.
If it helps, here is the ruleset that is giving me these problems:
http://d.pr/f/10ybi/592LFV6j
These rules are applied to a folder called "_CAMERA UPLOADS" in my Dropbox folder.
Any ideas what's going on here?