The problems caused by having Sonar's MIDI buffers set to the default of 250 (dropped notes, notes out of order, strange synth and step sequencer behaviour etc) turn up in the Sonar forum again and again. It's amazing how many different problems can be fixed simply by increasing the MIDI buffer. A setting of 500 seems to generally do the trick.

So, how about setting the default on installation to 500 rather than the current 250? Should be easy to do I would have thought.