I keep getting a weird string of numbers and letters after my postings on peoples walls. It looks like this

8fc454d1-298d-4d85-8ae8-20cea8b9d143
1.03.01

How do I get this to go away?

Thanks for the help
8fc454d1-298d-4d85-8ae8-20cea8b9d143
1.03.01
oh and apparently forum postings too.

8fc454d1-298d-4d85-8ae8-20cea8b9d143
1.03.01