sage worksheet math processing loops

[LeonSwinkels]

Hi everybody,

I have installed sage on 64 bit ubuntu (sage-4.6.1-linux-64bit-
ubuntu_10.04.1_lts-x86_64-Linux.tar.lzma) and am running the notebook
on port 8000, using it from a remote location ( my workplace ).

When I create a new worksheet everything runs as expected, yet after a
few operations ( usually in the first 4-5 minutes ) the math updating
( bottom of the page: processing math ) keeps running. ( starts, runs,
finishes ) <- many times.

This does not change with different browsers ( IE/Chrome ) and the
problem recurs using a new worksheet, but also stops after closing the
browser window and returning after a few minutes.

Is this a known issue? Is there anything I can do against it? This
prevents me from working with sage at the moment.

Thank you all very much in advance,

Leon