Creating a Review causes Out of Memory error

When a Review is created, review content is added, click Done and an error is generated (see below)

Windows XP, with FireFox 4. The browser does not crash, and the review is successfully created. This has happened a few times, but is not consistent.

Error
[Exception... "Component returned failure code: 0x8007000e (NS_ERROR_OUT_OF_MEMORY) [nsIXMLHttpRequest.responseText]" nsresult: "0x8007000e (NS_ERROR_OUT_OF_MEMORY)" location: "JS frame :: http://crucible.forge.avaya.com/static/ljbmpd/concat.crucible.ddc872982a0a3de00fc70ca17bad9c4a.cache.js :: <TOP_LEVEL> :: line 3486" data: no]
Error 2
[Exception... "Component returned failure code: 0x8007000e (NS_ERROR_OUT_OF_MEMORY) [nsIXMLHttpRequest.responseText]" nsresult: "0x8007000e (NS_ERROR_OUT_OF_MEMORY)" location: "JS frame :: http://crucible.forge.avaya.com/static/ljbmpd/concat.crucible.ddc872982a0a3de00fc70ca17bad9c4a.cache.js :: <TOP_LEVEL> :: line 3659" data: no]
You are running release CR2.5.4 FE2.5.4 (20110408064401 2011-04-08), please report your release number when reporting bugs.