I've noticed a couple times, that when I kill numerous monsters consecutively It will show Massacre: 10 monsters kill but will not show exp gained. Ive also noticed it on a Mighty Blow: 11 monsters killed with one blow, No exp showing.

I'm not sure if I get the exp. It really hard to tell cause its only like 11 exp or something. But this has happened numerous times. Managed to snap a screenshot.

http://s1151.photobucket.com/albums/o633/Disabled87/?action=view&current=Screenshot006.jpg

The amount of +EXP should show up above your character in gold text. It will only show for a second or two.

Let me know if this is not the case please.

Hm, I have dispatched many mobs with no XP return.

I figured once your level spread (vs mob level) reaches a certain point, there is no XP reward?

That's a bug. I'll check it out. Thanks for your reports guys.