clark y,
I think your boost pump problem is different to hosseins as in, his pumps were operational (except for possible boost pump chk valve failure/s) and I think you too may have had chk valve failure on the other wing with the two operational pumps. But you neglected to explain what happened with fuel tank qty indication once in cruise.
With regards to hosseins fuel temps, 3 temps are above zero and 1 temp below zero. I tend to think a false/faulty temp sensor indication on right outboard tank. My reason being that all tanks have had the same amount of "cold soak" while airborne, all be it, it was a short flight and not really long enough for a good cold soak. As far as the warm fuel and IDG theory, it doesn't happen, fuel does not return to the tanks from the engines.