The Navisworks 2013 Update 2 readme cites several buggy features being fixed, primarily around crashing issues. Alas though, still no fix for the READER portion of RMEP files where it brings in the pipe fittings as single-line.
I discovered something great! SP2 must of fixed one major issue with the Clash Detective. Now, when you write the Report = Viewpoints, the Viewpoints created 'remember' how you viewed it in the Results Tab, what is on, what is off, Dim settings, etc...wonderful.
Important HotFix to preserve Markups on the Results Viewpoints: