This may be a different issue, but maybe trying this would help in the future:
http://puredata.hurleur.com/viewtopic.php?pid=28468#p28468

I forgot what error message it gave me, but this error seems to be abled to be caused by the same problem.

Why not try something on the other applications end?

Also, saying what the other application is may help.

You could try striping the last character of the incoming stream as a hackish way to fix this.

Hi, I know this is an old thread, but since I found this with a search, I figured other people may do the same.

The problem is with Lion saving the application's state. So what you need to do is to clear the save state. Easiest way I found was to follow the instructions on here: http://osxdaily.com/2011/07/17/delete-specific-application-saved-states-from-mac-os-x-10-7-lion-resume/
and delete "org.puredata.pd.wish.savedState"

If you want a terminal command, this should work:

rm -R ~Library/Saved\ Application\ State/org.puredata.pd.wish.savedState

You may need to prepend sudo to it.

Hope this helps