I have a project with 6 tracks froze. When unfreezing 3 are moving backwards 7 measures? I haven't seen this before, any ideas? I did a "save as" but that didn't help.

"Backwards" means earlier or later? Exactly 7 measures? Any chance tempo changes were made while the tracks were frozen? What synths? 

earlier. No tempo changes. All 3 are Amplitube, but another Amplitube is staying where it should.
 Exactly 7 measures.

So these are audio clips with Amplitube in the FX bin? I thought you meant frozen synth tracks. Not sure what would cause that, but did find this old thread describing the same thing involving Amplitube, so possibly there is some issue with that plug... or it may be just be coincidence since I specifically searched on Amplitube:
 
http://forum.cakewalk.com/Unfreezing-moved-clip-UPDATE-another-clip-moved-without-freeze-m1125975.aspx

Yeah, they are audio. All effects (including Amplitube are in the Pro-channel via an fx chain in Amplitubes case). I have to save resources with this project to keep my 128 buffer setting. I can't hardly play guitar with it any higher than that. It's strange...I haven't had this happen before.

brundlefly
So these are audio clips with Amplitube in the FX bin? I thought you meant frozen synth tracks. Not sure what would cause that, but did find this old thread describing the same thing involving Amplitube, so possibly there is some issue with that plug... or it may be just be coincidence since I specifically searched on Amplitube:
 
http://forum.cakewalk.com/Unfreezing-moved-clip-UPDATE-another-clip-moved-without-freeze-m1125975.aspx

To be honest, this link could be the answer. I can't remember if I did what it describes or not. It was an easy fix (since they all moved 7 measures)...I just thought it was strange. I'll pay a little more attention in the future.

When you unfreeze a clip it moves back to it's original unfrozen position.
If you've edited the frozen clip (trimmed,split, etc) those changes evaporate as well.
 
I recently learned in another thread that you can right click on the freeze icon and select to leave the FX Bin unfrozen (frozen track/unfrozen FX Bin - live effects). Even though it would used more CPU this option would have saved me some grief in a recent project where I had to rerecord a guitar track because I had rearranged a song (editing & moving frozen guitar tracks in the process) and then at mix wanted to change the amp model used in Pad Farm plug-in I had in the FX Bin.  
 
I haven't used this partial freezing yet in a full project; it might leave me with a CPU load that is too high for my wimpy processor on a big project. I might just have to get in the habit of making sure my tracks are unfrozen before I move or edit clips. Something new (for me at least) to experiment with.

A very quick workaround if you find that there's too much latency at your chosen buffer setting whilst tracking is to temporarily bypass all your Fx plugs (hit 'E')
 
In the mixing phase you can of course jack your latency up to whatever you want, it's not relevant.

i had one occasion lately where I had melodynized a clip and then wanted to freeze it and get a bounced clip, yet when doing so it moved immediately (without any user interaction) and this particular vocal line was completely out of sync with the rest of the song - when trying to export the mix as audio WAV the same happenend ...
 
i realized that the clip was located after a tempo change - and that apparently confused Sonar/Melodyne because after removing the tempo change (which was only possible since this was a creative session and we could simply ditch the part before the tempo change), it froze/bounced perfectly
 
meanwhile there was a melodyne upgrade with ARA improvements, but I have not had a similar situation since so I can't tell if the problem still persists ...

Certain soft synth patches don't respond too well with tempo changes in Sonar.
 
I remember well a Dim Pro patch that would suddenly start to break up after I inserted a rallentando in a particular section.
 
I never found a viable workaround, other than doing it in another project with no tempo changes, then copying it back & trimming it.