If you depend on Automator workflows for managing music or other tasks in iTunes, the upgrade to version 10 may have come as a bit of a cold shock. Macworld pointed out that most available workflows for iTunes simply would not load with iTunes 10; a frustrating circumstance, to be sure.
Fortunately, the problem turns out not to be that complicated; Automator's version checking thinks that iTunes 10.0 is a lower version than 9.0, because the versions are sorting alphabetically instead of numerically (oof!).
