Has anyone experience WoW lock-ups when you try to do timed quests?

For example I've tried to do both Freedom for All Creatures & Tooga's Quest today but when I accept it on my main and get the popups on the others all my wow clients freeze. ...I have a feeling that the OOX quests will be the same too... but all that XP ;(

Is there a solution to this, or is it simple buggy quests/comp issues?

Thanks in advance for any insight

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