Jamba 0.5 available for testing (Update 12).

[Jafula]

Yep. Still getting spammed with either the last accepted quest or (if I just logged in) empty accepted quest as in the pic. ONLY does it if I use my accept macro.

/script --/click SmartBuff_KeyButton
/console Sound_EnableSFX 1

/script AcceptGroup();
/script AcceptQuest();
/script AcceptTrade();
/script RetrieveCorpse();
/script RepopMe(); 
/focus dondeltoro

/in 5 /script StaticPopup_Hide("PARTY_INVITE")
/in 5 /script StaticPopup_Hide("QUEST_ACCEPT")
/in 5 /script StaticPopup_Hide("CONFIRM_SUMMON") 

/script SelectGossipOption(1)

You are getting this spam when you use your accept macro, because you have /script AcceptQuest() in it. I have no way of knowing that this AcceptQuest is coming from your macro and not a genuine WoW call.

Re: the accept quest spam on login. I'm guessing there is another addon that iterates all the quests when you log in and somehow Jamba is getting caught up in it. I'll have a closer look.