@ICBM problem: this is mighty STRANGE. For everyone else, it had dissappeared when blown up, like it should... You're saying this happened while it was loaded? Anyway extensive testing had shown no problem here - ICBM's blew up properly all the time, loaded or not... try to reinstall, maybe? Your saves should work.
@Pollution problem: well, sometimes it is simply inevitable. Recycling Plants move the "clock" backwards a bit, there is also Kyoto Protocol wonder that temporarily turns off the pollution. Still, the AI won't stop polluting, although they're very rarely causing really heavy pollution (they often use the Ecotopia govt anyway). So: no easy solutions here, sorry - it takes a lot of skill, and sometimes military action to save the planet
@New tile improvements: Impossible afaik. Well we COULD make roads and railways above water, but come on. Bridges spanning tens of miles, in the bronze age? I'm afraid you have to wait till Maglevs :P
@Airport gold: Yeah, I was thinking about that. But, I don't really want forest tiles to be spammed with airports. Some tile gold generator would be nice, though - we'll keep that in mind. In the update, the level 2 and 3 nets generate +5 gold, and some of the goods also generate extra gold (above the usual +10).
@"Turrets": We were discussing this idea with Solar and Eerion lately. As for now, the game is very offense-heavy, and we were thinking about putting some more strength into defense. The idea is to make it possible to upgrade units in Forts into *immobile, powerful garrisons with ranged attacks*. This would make forts much more useful, but I'm still not sure if I'll be able to pull it off, as it would take some creative SLIC programming...
@Underwater/Sea: the update is *heavy* into that. Sea and space cities are even more powerful, and the high end units/improvements are either unavailable on land or extremely expensive. You'll need to invest into sea and/or space to be able to assure a long-term victory.