OK. I did find a few dopostback links that work. But many do not work and I just do not understand why a few work, but others do not, like the cancel link on the registration page.

I found this also in the debug window of FireFox...

Type.registerNamespace('Sys.WebForms');Sys.WebForms.Res={"PRM_UnknownToken":"Unknown token: \u0027{0}\u0027.","PRM_MissingPanel":"Could not find UpdatePanel with ID \u0027{0}\u0027. If it is being updated dynamically then it must be inside another UpdatePanel.","PRM_ServerError":"An unknown error occurred while processing the request on the server. The status code returned from the server was: {0}","PRM_ParserError":"The message received from the server could not be parsed. Common causes for this error are when the response is modified by calls to Response.Write(), response filters, HttpModules, or server trace is enabled.\r\nDetails: {0}","PRM_TimeoutError":"The server request timed out.","PRM_ParserErrorDetails":"Error parsing near \u0027{0}\u0027.","PRM_CannotRegisterTwice":"The PageRequestManager cannot be initialized more than once."};
if(typeof(Sys)!=='undefined')Sys.Application.notifyScriptLoaded();

Hi Sebastian,

Yes. I found http://www.dotnetnuke.com/tabid/795/forumid/108/postid/406427/scope/posts/default.aspx and disabled the compression, and it all works again.

I spent 1/2 a day on this and a large part of our site was broken. I am so glad there was an easy solution.

Thanks!

Steve