Currently build numbers over 1000 in IM messages use commas in the build numbers. This looks a bit silly:

> Confluence build 1,002 has FAILED (4 tests failed, no failures were new) : Change made by jschumacher

It would look better with a NumberFormat of "#", which would look like this:

> Confluence build 1002 has FAILED (4 tests failed, no failures were new). Change made by jschumacher.

(With punctuation fixed as well. )