I modified the build.prob a little and wrote a little script to push in on the phone:
B63M Market Fix
Your phone needs to on and set to the USB-debugging mode (settings - applications - development - USB debugging). Your phone needs to be recognized as an ADB-device by your pc. If you are missing the drivers, sometimes it helps to install PDANet first.
Run the fullmarket.bat then re-boot the phone. If the script doesn't work, you can also copy and replace the build.prob manually (with the root explorer, for example). As always,