I found the problem. There were some javascript issues with the RokCandy plugin, which were fixed in version 0.86a of RokCandy.
I was guilty of using a very old version of RokCandy
[code:1]
0.86a Released
37.
38.10/06/09 Brian Towles
39.# Added better javascript handling to fix issues with Community Builder and more. [/code:1]