I'm getting this too, mentioned here:
http://hutonggames.com/playmakerforum/index.php?topic=12277.msg57209#msg57209Its been a while since Alex said he would look at these problems, but no dice yet
So, back to actions spitting out error messages they have no right to - I have found that some templates I was using were throwing the same error messages when I dug down into my projects heirachy & was just enabling & disabling them in the editor - and they were phantom error messages too - no problems with the template, however when I removed the template in question & stuck it back on 'some' of the error spam went away.
I think its almost certainly a bug either in the upgrade process to 1.8 or the new error checking behaviours that actions are throwing error messages that seem to be eminating from other fsm's and its really difficult to track down the actual culprit (if there is one) in these cases.
Also really not liking whats happened to the Actionhelper's - (could use better documentation on these please) I seem to be getting better results swapping out all my actionhelper calls with my own getcomponent functions.
Would really like to try out those fancy arrays & enums (they look great) but I'm stuck with this stuff atm.