Has there been any developments with this issue?
I'm having the same problem with the following setup:
Backup Exec 2014, hotfix 218257 installed (all updates applied at time of post)
Windows 2008 R2 Standard SP1 (with all updates) w/8GB RAM running bare metal on Dell R510.
VMWare Backup, SAN Transport, via VCenter Virtual Appliance 5.5 (Cluster of ESXi 5.5U1 1623589-Rollup Hosts running on Dell R710's)
Occurs only on Incremental (not tried differential, but full works fine) with any AD controllers backed up using GRT (Applications & Databases). AD Controllers are running Windows 2008 R2 Enterprise SP1 with updates applied. AD Controllers have VMWare Tools, then Backup Exec Agent installed in that order, with no VSS issues, and are also running Symantec Endpoint Protection 12.1.