[Trinidad] PageFlowScope query parameter is duplicated (sometimes)

[Bram Van Dam]

Howdy,

There appears to be some sort of bug in whichever javascript adds the 
pageflowscope's _afPfm parameter. I start off without one, and every 
time I click on a link the same parameter is added again.

/index
/index?_afPfm=z6kp6zxf1
/index?_afPfm=z6kp6zxf1&_afPfm=z6kp6zxf1
etc

There's quite a lot of JS in Trinidad, so I'm not sure where things are 
going wrong..

Has anyone else experienced this?

 - Bram