I tried using firefox on my Mac and it posted, but I did get that hung page. I meant to clear my error console beforehand, but forgot, but did clear it before going back to your page. Then, I got 3 errors and 2 warnings from your page:
Quote:
Error: this.docShell has no properties
Source File: chrome://global/content/bindings/browser.xml
Line: 0
Error: uncaught exception: Permission denied to call method Location.toString
Error: uncaught exception: Permission denied to call method Location.toString