That i have seen also. Normaly ePo4 use this identification: 5345.0000 Last week i deploy an agent on a old client and in this case ePo4 show following: Virusscan 8.0.0 Wrk and Dat 4.0.5032 But few minutes later change it to Dat 5345.0000 after update.
There has been some other threads relating to this. As far as I can tell, it is the version of agent that determines the format of the dat. It is a real headache in our environment that has both 3.6.0 and some 3.5.5 CMAs. It has made any sort of dat report rather useless to me.