I have some issues with my test environment after upgrading to VS2013 and Test Complete 2013.
1. The backward compatibility is broken. If you have in the Solution Explorer items created with Test Complete 9,they are with extention *.tc9Test. VS13 supports only *.tc10Test. No conversion is available.
2. If you create new Solution Explorer item and try to run it using Microsot Test Manager Test Plan via a dedicated build, to another machinte where the tests are supposed to be run with Test Execute, you'll get that tc10Test is not a supported test format.

Have anyone else had such issues? Any ideas how do solve/work arround it?

Thanks in advance!