Question: Maple no longer computes integrals after Ubuntu Upgrade to 12.04

Sorry, I understand that my question sounds crazy, but that's what happened:

  I had a working Maple program  and Maple 15 installation on Ubuntu 11.10 64 bit

After I updated to Ubuntu 12.04 ,  Maple 15  starts, but returns almost all (except most primitive)  integrals unevaluated.

My old working worksheets not return all integrals unevaluated. 

Same with Maple 14. 

I have no idea what could have happened...

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