User blog comment:Rappy 4187/Technical Update: February 5, 2013/@comment-957747-20130206165419

Today's update has brought back "category blue links" ("red link" categories no longer have the "newcategory" class). This was an unfortunate side-effect of overhauling the design of one feature without realizing it was working with another feature to TAKE OVER THE WORLD. This "bug" is known and being worked on and the harmony between these two features should be repaired next week.