I have just performed an upgrade from 1.1.0 to 1.2.0. My databases are there, my desing documents are there.
I can access futton, I can login. So far, everything ok!

But when I access any view, futton just stalls. I have taken a look at the log, and I see lots of messages like this:

[Wed, 12 Sep 2012 13:22:38 GMT] [error] [<0.990.0>] OS Process Error <0.1122.4> :: {os_process_error,

Accessing the "Status" page blocks futton.
I have also tried to run the test suite (first test, "basics") without success. I have attached a log.

How can I troubleshoot this? Is there any information on how to upgrade from 1.1.0 to 1.2.0?