group policy failed

We've had 2 domain controllers - a windows 2003 and windows 2008 R2.  Yesterday we had a vendor demote the 2003 server and promote a new 2012 server.  Everything seemed to go smoothly, but we started having issues with one of our applications.  We found that the users were getting the following errors:  processing of group policy failed (some error code 1055 and some 1053 or 1054).  For some odd reason, my pc is processing the group policy and that application is working on my pc.  I think the 2 are tied together.  

I have no clue what to do / what to look for.  Our vendor has limited availability today so I'm trying to see if anyone can point me in the right direction.  We've checked DNS and that appears to be fine.  The vendor said there was a corrupt sysvol that was resolved last night, but the issue is still continuing today.
cindyfillerDirector of ITAsked:
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Double check whether the new 2012 has sysvol/netlogon published and sync.
Do you currently record when a user logs in and logs out what the logon server is?

Did the changes include updates to the DHCP scope option to push the correct DNS servers?

Not sure the process used,

Repadm /showrep

What do the errors say that the GPO could not be accessed?
cindyfillerDirector of ITAuthor Commented:
My vendor did become available so I was able to work him.  There were several issues, but in the end it turned out that the new ports for Windows 2012/2008 for group policies were not open on the firewall.

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cindyfillerDirector of ITAuthor Commented:
It was a firewall issue as indicated in my last comment.  I want to award points for anyone who answers, but also want to indicate the solution that worked for me.
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