XCode corrupted after macports install

[anonymous]

I know this is completely out of left field, but after installing macports, subversion, cmake, and opencv, my XCode application stopped running any projects.  It will build my projects fine, but it will freeze when it tries to run them.  Freeze, meaning it will look like it's trying to run the project, but it will never show any output, and it won't stop when I hit the stop button. Even for a simple C++ helloworld project, the same problem occurs.  After it builds, I can run the resulting executables from the terminal, but XCode itself freezes when it tries to run after building.

Reinstalling XCode sometimes fixes the problem, but it will reoccur within a day.  Reboot doesn't help.

I'm using Mac OS X 10.8.2, and XCode 4.6.

This probably has nothing to do with macports... so apologies in advance. I'm desperate.

Thanks a ton for any help.  
--Ian
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