rise level and adprep vs mapping shares and printers by IP

last weekend we executed a domain rise level to Windows 2003 native and adprep for the forest, domain and gpprep.  All logs without problems.  But... today all users in the domain are reporting that when they are logged on Windows 7 and Windows server 2008 equipments, if the user tries to map a network share or a printer (both in the same domain) by IP  (\\10.10.10.1\share1), they are prompted for credentials, they give the user and password, and they get the error code 0x80070043 - the network name cannot be found.  However, if they execute the same test on the same machine but specifying the name of the server(\\server1\share1), they map the share and /or printer without been requeste for a user and password and without any problem.  On other hand, if a the same user logs to a Windows server 2003, they can map the shares and printers by name and by IP without problems and without prompting for user and password.  Notes: there are the ptr records in the DNS, it is not the problem.  Dcdiag and repadmin and logs look ok.  Logs from rise level and adprep: all ok without errors.
FRANCISCO MENDEZAsked:
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Neadom TuckerCommented:
The objects may have had some minor changes.   Have you tried to recreate the shares and see if that makes any difference?  I have not done a 2000 to 2003 update in so long I cannot remember all the issues that would normally come about.
Will SzymkowskiSenior Solution ArchitectCommented:
Raising the Functional Level should not create an issues on the end user with logins etc. The functional level only affects domain controllers and the features they can use based on the functional level they are at.

If your DC's are replicating correctly and there are no errors in the logs then this might be related to something else.

Will.
FRANCISCO MENDEZAuthor Commented:
finally we found the cause of the problems...  Some days ago it was a applied the critical security patch KB3002657, so when the reboot of the domain controller for the rise level, the patch was also applied and it couses all the crazy validations behavior.  Now it is a new version of the patch for servers with operating system Windows server 2003.

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FRANCISCO MENDEZAuthor Commented:
te first answer helped to look for the root cause on other way.  The root cause was the patch that was activated after the reboot of the rise level.
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