Perhaps you want to upgrade to Update Rollup 12 or the December 2012 Service Update, but you haven’t been able to test your scripts on browsers other than Internet Explorer? You may want to download and install the solution described in the technical article: Control Which Browsers Your Organization Supports. With just a little configuration to this solution, you can create a policy that controls the browsers that users in your organization can use to access Microsoft Dynamics CRM. (By default, it enforces the use of Internet Explorer.)
This solution isn’t going to fix any problems with your scripts, but it may help narrow the scope of broken scripts to just those involving Internet Explorer. The solution can also provide some time for you to do testing with other browsers until you uninstall it and allow people use the full set of browsers now supported by Microsoft Dynamics CRM.
As we were developing this latest release of Microsoft Dynamics CRM, we used a modified version of this solution with our internal CRM implementation so that people could not use Internet Explorer. We did this so we could discover issues that might exist with other browsers. It came in handy!