Yesterday evening, one of my Veeam servers thrown identical error - I saw this also for the first time:
Full backup file merge failed
Error: There is an item with the specified name and another type.
Checked files on VBR and it seems that there are two identical files with different extension:
7.1T Aug 30 22:54 backup_by_all_daily2016-07-18T230050.vbk
2.3G Sep 1 12:48 backup_by_all_daily2016-07-18T230050.vib (time stamp is fresh because of Retry)
I installed Update 2 about 1-2 days after GA, so installation is up to date.