GPOs On Different DCs Have Different Time Stamps

Question

Hi All,
I believe that we may have a GPO replication problem. Different PCs in the same OU report different settings as displayed by gpresult.exe. It looks like some PCs are getting old versions of the GPO.
I did some digging,and found a utility called gpotool.exe from the 2003 reskit.
(Our DCs are all 2008R2 running at a 2003 functional level. Two sites, well-connected by 20 Gb links.)
After considerable searching, I have been unable to find any explanation of the errors anywhere. In fact, the tool has little documentation anywhere. The error messages look like this:
Policy {01BC3F84-0862-4CEA-A228-A36D6C62A612}
gpotool: e    ERROR: Err: Size different between Machine
Error: DC6.mydom.ca - DC8.mydom.ca sysvol mismatch
gpotool: e    ERROR: Err: Size different between MachineI
I tried to load the stats into a spreadsheet by creating a report using powershell to query all of the GPOs using
get-gpo. Sadly, this utility does not retrieve any size information. What it does highlight however is that the GPOs have different modification times on different DCs.
In most cases, the time stamps differ by less than an hour, but a very few GPOs differ by several days.
My questions:
Is it normal to have different modification times on different DCs?
Is the report from gptool.exe valid, or should i ignore it?
Many thanks in advance!
Consume. Conform. Obey.

Answer 1

This is an FRS issue. Have you looked for issues/errors regarding FRS? The GPO time stamps are a symptom of this problem. 
1. There is a GPOTOOL.exe for 2008+ that MS never officially released. It works on my domain. I can publish it to a DropBox public folder if you are interested.
2. Or you could stand up a Win8 box and install RSAT tools and load the GPMSC console. It has WONDERFUL tools that address this very issue. It has the GPOTool "built in" among other nice things. 
Charlie Newman