Wasn't going to post this because some magic made the original problem go away, but just in case it comes back... my sitelett search makes it easier to find stuff than searching for commented out code :-).
Needed a container control for a Repeater's ItemTemplate so users could get the info from any collection of display controls (labels, images, whatever) and just click anywhere in the set for a serverside event instead of putting a button into the mix.
Easy enough, added an inherited Panel. Worked fine as a drop-in on test pages but when added to the Repeater and was inline bound the doPostback javascript errored out on registration. It was being rendered correctly in the html but when used in an ItemTemplate it didn't want to even get past page_load.
So I hand-wired the Render method to use the settimeout style and poof, it worked as a list item container.