I have a piano track which sometimes plays back as if the sustain pedal is depressed. In looking at the pedal pane in PRV clearly there is no pedal event. If I move the start time just a little, however, it will play back normally. It seems there are certain spots in the track which will play back with the pedal held down. This seems to happen about 50% of the time. It happens whether in PRV or Track View. Any ideas?

Are there any other types of events in the MIDI track that is playing your Piano, or are there only note events in the track.  One other CC that could do this is CC72 which , on some synths, control the note release times.

You might also try having a look at your MIDI buffer size. If it's too small, it might not be sending the corresponding note off MIDI events.

Preferences | MIDI | Playback and recording | Prepare using......  try increasing this value.

This may be a different issue but if you are using the sustain pedal at all be aware there is a bug in the X series affecting certain plug-ins that took some time to identify and was not fixed until after the last update for X3. IOW, you will have to upgrade to get the fix but there is a way to correct the data in older versions of SONAR.
 
This is the last thread about the problem http://forum.cakewalk.com/FindPost/3030997
In this thread is an explanation of the bug http://forum.cakewalk.com/FindPost/3108848
And a CAL script to fix the data http://forum.cakewalk.com/FindPost/3108868
 

is it a track you created on your own or a Midi track from something like.. EZ Keys ?

@promidi No other events in the track. Changed buffer size to 250 (from 25), no difference. One change I made recently though is that I combined 3-4 projects into this one project, since it's all the same piece. So while it uses the same track layout as all the smaller pieces, it's now 12 minutes long instead of a handful of 3 minute pieces.
 
@scook I think I have the latest X3, which as I understand is X3e build 246. 
 
@chuckebaby This is a track I made on my own, the instrument is my Yamaha elec piano

jkoseattle
@scook I think I have the latest X3, which as I understand is X3e build 246.

I have X3e Producer which is v20.0.5 build 352. I am not sure about build numbers for Studio or the base version but X3e was the last update for the X3 line. The bug I mentioned was not fixed in the X Series. It was corrected in SONAR 2015.