Unfortunately, we have had to reset the ratings (1 to 5) of every tag in the database.  For the next little while, most tags will show no rating at all.

The ratings system was being abused - people repeatedly clicking "5" (or "1") in an effort to promote (or demote) certain tags.  We didn't anticipate this behaviour when we created the ratings system (very shortsighted of us), and so now we're left with no choice but to clear the ratings of ALL tags and ask that people rate tags again.  The new rating system is not able to be abused like the first one.

After a few months the rating system should be healthy and useful again.

Apologies for any inconvenience.