Playing a custom map I was all set for some trading. The way my map is built each area of the world has plenty of some resources, but is lacking in others. So, I was playing as the Germans and was prepared to trade timber (a new strategic resource required for chariots and pre-industrial ships), for other resources/luxuries. Anyway, I successfully traded away all of my surplus timber. The next turn I exhausted 4 timber resources! This not only left me without timber to build ships, it also broke 3 trade agreements. Soon I had to deal with some very unhappy neighbors... but could not build any new ships. It didn't really matter, I wouldn't have stood much of a chance against Byzantine dromons, Viking longships and Greek triremes with my silly German galleys...
The only thing more aggravating than that is when I wait an hour for my 240x240 custom map to load up the first time and then about two turns into I notice another mistake. If it is minor, I make the change in the editor and keep playing, but if it is major, back to the editor... wait another hour, then start playing again. I am not kidding when I say that I have been playing the same custom map for a year and have not made it more than 100 turns into any game. Usually I make it about 40 turns in before I notice so many things I do not like that I am forced to restart the whole campaign. I think by the time I have it the way I want it, Civ IV will have come out and I will be back to square one... Call me Sisyphus I guess...