DF, I know that Biggs has talked to you about this before but I thought I would bring it before the community to see what they think.
On certain custom maps (ie. cp_orange_x) there is no real defined timelimit. You can literally play for hours on end with no hope of the map changing. I've researched the problem a little but there doesnt seem to be a whole lot of information on it. There are a few ideas that popped up in odd places about the map not having some sort of point/roundtime tracking entity on the map or no clear goal defined in the map (one that triggers a round end).
I was wondering if there was some sort of code that could be implemented for custom maps such as this that would FORCE the map to change when mp_timelimit expired. It might even force a timer into the map without editing the map file (something akin to the objective timers in dustbowl, hydro etc.)