Error: The semaphore is set and cannot be closed.

Look into stderr of the Tasks you reported. There I find:

2006-09-02 22:22:01.2110 [CRITICAL]: First object in file ../../projects/einstein.phys.uwm.edu/h1_0370.0_S5R1 (block 78) is not (double)1.0!
2006-09-02 22:22:01.2110 [CRITICAL]: The file might be corrupted

I suggest you reset the project to download new files. Scanning your harddisk for errors might be useful, too (but won't fix this problem by itself).

BM