chitowndoll,
I can agree with not wanting to do something and realizing only after the fact that something wasn't your cup of tea. But, be mature about the whole thing. Realize it at the beginning as something your not going to do in the future but man up and continue to do what you agreed to do.
I wouldn't be shocked to hear that changing the marquee was set up from the get go. That way the audience members who didn't pay attention to Howard's time off would at least get a chance to notice it and thus have no complaints from ticket buyers. But, now that I think of it I do wonder if they did it because Howard in fact isn't coming back.
"If you try to shag my husband while I am still alive, I will shove the art of motorcycle maintenance up your rancid little Cu**. That's a good dear"
Tom Stoppard's Rock N Roll