Q1 2010 BETA
There is a known issue with Firefox sometimes crashing when using
RadAsyncUpload if the current version (1.5.0) of the Firebug extension
is installed. This is a
reported bug
in the Firebug extension. It's already fixed in the latest source code
of the extension and the next version of Firebug should resolve the
issue.
It is possible to work around the problem at this moment by disabling
Firebug's Net Panel.