I use Hazel to organise client files (and much more) on internal HD (current files) and external (older stuff). To maintain compatibility with my archives I have continued to use OM Tags to drive this.
Since upgrading to Yosemite I realise that Hazel is not recognising the tags on the external drive and thus is not sorting files any more. The tags are still there: both Tags and Tagger show them although curiously HoudahSpot does not (nor the OS X tags for that matter), and if I move a sample file and the rules back to the local drive Hazel works as expected.
Puzzled.