No dust blobs on mine yet, but I'm sure it'll need a clean soon. Anyone opened up their HS50 for a blast of compressed air...I'd be interested in the best way to open it up safely. That said, I've not read any reports of dust blobs on HS50's yet. Plenty on other similar projectors (i.e. AE700 and Z3 etc)...... so is the HS50 uniquely unaffected? or is it just that nobody has clocked up enough hours yet?