http://www.cakewalk.com/Support/kb/kb2005283.asp
SONAR 4.0.4 Maintenance Release
Notable Bug Fixes:
On rare occasions, existing tracks that were playing back could drop out and stop playing while new tracks were being recorded.
Clip envelope editing anomalies, which could occur when 1) creating a clip envelope in a project that had tempo changes, and 2) the clip was position after the tempo change and 3) the Now time was over the clip and 4) new nodes were created before the Now time.
When punch recording, newly recorded clips were 3dB too loud if the panning law was set to -3dB.
The Go-Previous Measure command would not move the Now time earlier than the current measure.
When deleting a dotted line envelope—such as a Mute envelope—could leave the group “latched” in an undesirable state. For instance, a track could remain muted even if a Mute envelope was deleted.
The Edit-Split… command would sometimes not work properly when selecting “Split Repeatedly”.
Jump envelopes did not take effect when the Now Time was moved during playback.
Muting a cropped clip with the Mute tool could prevent the clip from being included when exporting or bouncing the clip.