"no it doesnt create an anonymous sub it doesnt need to

If you are so sure of that then prove it, show me a link to the arrayref processing of Tkx:after calls, or tell me where to look for the code. Till then my thought that processing of a arrayref in the callback position creates a single use anon-coderef still holds as it explains why that call method works, like the the sub{...} method does, but the static coderef fails. (well at least on unix).

There is deep autoload magic going on in Tkx that i still dont understand and i have yet to find out where the parameter munging actually takes place to move across the perl<->Tk/Tcl boundary. Ive even tried to look for it.