Fixed an issue with the postMessage check throwing an exception in Firefox 2.
Fixed an issue with the postMessage check throwing an exception in Firefox 2.

kcomkar/testswarm,rwaldron/testswarm,newzly/testswarm,newzly/testswarm,concord-consortium/testswarm,newzly/testswarm,rwaldron/testswarm,newzly/testswarm,concord-consortium/testswarm,kcomkar/testswarm