ein video sagt mehr als 1000 worte, maybe not. the glow effect acts weird but might be just one symptome of something bigger.
create a fresh glow fx node and the result has some funky transformation, once you reset the node (alt+rightclick) it does work like it should be.
maybe connected to this are some fuckups with dx9texture…not constantly reproducable. switching to version 31.1 makes all problems disappear…mmm