I have seen it in mozilla version 3.6.15 (both with avast 6.0.1000 and 6.0.1035)
With mozilla 3.6.16 and 4.0 i have not seen it.(i see only wot in google search).
Anyway different machines…, different reactions
Hopefuly this has been fixed now. The trouble is that it is difficult to reproduce this issue as Firefox decides who gets loaded first. I assume this only happened when WOT got loaded before WebRep. Rport back if you still experience this after the next program update please.
If you are still seeing double after the reinstall you might try this.
Right click in Firefox to the right of Help. Left click on Customize. After the Customize screen pops up try dragging one of the WebRep icons into it and see what happens.