Thanks Link - i'd seen that page earlier and forgotten about it! The news that Cadimage add-ons are causing this is not good but now i think about it this layer did only appear when I installed Key Notes! And i was just starting to like it too ...
Design Technology Manager
| francis-jones morehen thorp
iMac 27" i7 2.93Ghz | 32GB RAM | OS 10.10 | Since AC5