Anyone know what these numbers are about
 

I have a new user just joined my forums and every time he makes a post these numbers appear under his message. :confused:

c6726eaf-ad36-45eb-876a-b753cb070bed
1.03.01

I asked him what do these mean and he said he has no idea and that he is new to forums, this must be something that his computer is submitting surely. :confused: