Since installing ArcGIS 10.2 I have been having a lot of problems with the trace tool and snapping. Trace keeps stalling mid-segment on continuous lines on both creating new features and when tracing to cut a feature. Sometimes it restarts if I zoom or pan slightly but after doing this a couple of times it just stops displaying where I have just traced and I have to restart. At some zoom levels it just refuses to start at all. I've also had a number of occurences of snapping just refusing to work on existing points. Never experienced these issues with 10.2.
Cheers
Mark
Cheers
Mark