Cannot Save Account in CRM 2011 using Firefox

Hi,

     I am running an organizationally hosted instance of Dynamics 2011.   I find that in Firefox 22.0  it does not allow me to save an account (old or new).  The only message I receive in the browser is:

An error has occurred.

     The event log on the server reads as follows:

NT AUTHORITY\SYSTEM
   FormatException
   Input string was not in a correct format. at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)...

    Any thoughts or suggestions?  IE and Chrome work fine for now, however, I fear this issue may crop up in those browsers as well since everything worked in Firefox just a few days ago.  Thank you.