Hi,

i encounterd a problem when adding a Facebook Pixel tag. Without any modification and a mapped Pixel ID the following warning is generated "[Facebook Pixel] - Duplicate Pixel ID: XXXXXXXXX"

Taking a look into the the tag template the line fbq("init", ... is called twice. 
Once in the else clause of the u.initialized if-statement line 442 and once within the loader_cb function in line 324.

Greetings
Tobias