A Google search of Battlefield 1942+MAPVOTE_HEADING reveals others with the problem who fixed it by upgrading something to 1.6 and something about a patch.
I don't know anything about this, just wanted to let you know if you'll do some searching with Google, you can probably get it sorted out.
About 6 months ago my Battlefield 1942 mods (not the regular game) started to get this huge, looks like a billboard that blocked out almost the whole screen. All that was on it was, all capital letters:
MAPVOTE_MAPNAME MAPVOTE_MAPNAME MAPVOTE_MOD MAPVOTE_GAMEMODE
also adds; vote for berlin 0123...8902 something..., I don' play multiplayer so maybe it's got something to do with that. HELP, HELP.
I think it's some kind of add begging for votes for a stupid map. I don't think it has anything to do with the 2 computers I had and now have. For 3yrs I had a compaq desktop XP low end everything, now I have a middle road Acer Vista home basic,downloaded same mods same huge poster takes up almost all of my screen. First WHAT IS THIS CRAP, and how can I never see it again. I don't care how stupid my lack of understanding this looks just PLEASE LET ME PLAY MY Battlefield 1942 mods again. Just a reminder this only shows up on Battlefield 1942 mods, all of them. No other games are involved.
Thank you for any help, it's making me crazy.