I installed a clean version of the 4.7.0 source package.  I was able to get a site up just fine, however I am getting numerous javascript errors on every page.  The most common one is 'Sys' is undefined (this occurs 2 to 3 times per page.  Another one I get is 'webform_PostbackOptions' is undefined when I click a button that causes a postback.  I realize this is an ajax problem but not how to resolve it.  I have commented out the compression module in the web.config but that had no effect.  I have tried reinstalling 4.7.0 as well with no change.  Anyone have any ideas on things to try?

thanks,

Jake

Hello Jake,

I want to make an update for the previous entry. We have actually encountered the same problem again and this time only we discovered the real problem. The real underneath cause of this issue is that our servers time has been inaccurate. This was due to some problem with windows date time synchronization service. The important lesson I learnt here is the importance of troubleshooting an issue deeply till u get the full understanding of it.  I was able to tackle this because I use fiddler to monitor the HTTP traffic and was able to see the real error popping out from the web server.

Best Regards,

Uchitha.