Running revision 2273, the most current (as of march 4th if I oopsed the revision number), hovering over the second building icon in the tech completed screen of toolworking causes a CTD. Sorry, not sure what the building was and the game takes 20 minutes to load with all art in unpacked form so I can't load it back up for now 
National Units... are they being completely removed? I think that's a good idea, personally, and let them be integrated into the various flavor forms of current units instead. Easier to balance variations of common units instead of giving certain civs entirely different unit classes than their peers at various times.
Cavalry is still outrageously overpowered, but I'm pretty sure that's not going to change because I've mentioned this to you guys before, but that's nothing my own personal changes and tweaks can't take care of.
The new terrain graphics are really nice. Is the swampland a new terrain feature? I haven't played a lot of civ for a while so I don't remember. If it is new, what kind of uses will it have? Will certain resource bonuses only show up in marsh? Does it negatively affect health and disease like flood plains? I've seen a lot of mods adding marshland from Civ Col. but I hope it is added for a reason other than just to be added (which is not the case in most mods).
I'll try to test farther along and give you more feedback after work.
Is there somewhere else you would like me to post bugs, crashes, and/or feedback for 2.4? If so let me know.

National Units... are they being completely removed? I think that's a good idea, personally, and let them be integrated into the various flavor forms of current units instead. Easier to balance variations of common units instead of giving certain civs entirely different unit classes than their peers at various times.
Cavalry is still outrageously overpowered, but I'm pretty sure that's not going to change because I've mentioned this to you guys before, but that's nothing my own personal changes and tweaks can't take care of.

The new terrain graphics are really nice. Is the swampland a new terrain feature? I haven't played a lot of civ for a while so I don't remember. If it is new, what kind of uses will it have? Will certain resource bonuses only show up in marsh? Does it negatively affect health and disease like flood plains? I've seen a lot of mods adding marshland from Civ Col. but I hope it is added for a reason other than just to be added (which is not the case in most mods).
I'll try to test farther along and give you more feedback after work.
Is there somewhere else you would like me to post bugs, crashes, and/or feedback for 2.4? If so let me know.