Recalibration error

I just installed the R1/beta3 release, 64 bits and 32 bits on different partitions.
When I tried compiling a paladin project, I got the strange error message “586 device recalibration error”. The same project compiled perfectly on R1/beta2. My computer has an AMD opteron CPU. The same error also occurred when copying a folder full of files from one partition to another. Does anybody know what is going on, and how to solve it?