THANKYOU!!!
I signed up to Free-DC just to figure out where this mysterious 'MM' badge came from.
I still haven't figured it out but suspect it's from me checking the box on "If no work for selected applications is available, accept work from other applications?" for some project.
I went through the badges at Signature for BOINC users but none show the MM badge.
My working hypothesis was it's from MindModeling@Home (beta) but I don't see a badge forum discussion or explanation on the website.
Maybe it's from Moo! but they don't mention anything but the user 1%/5%/25% badges.
This user has only worked on 4 projects and the gold badge is Collatz, the cow is YoYo and so the MM is either Docking or Moo!
MM for "Moo Moo"?
EDIT: If I'd read this Milestones sub forum a few more minutes before posting this the MM would have been made clear.