[agracier]

I have the same problem as Poltava: Winter maps open without any trouble but I get that "Java Error message" also when I want to try out the Summer version. :-?
Your alternative by copying and renaming the load.ini works but then I don't have those nice yellowish and brownish textures.
So hopefully it will be fixed in the coming beta version.
Can't wait to try it out.

Here, this should have all the necessary texture files, so you can try out the map in the meanwhile. I double checked the listing and none are missing if you use the enclosed load_s.ini ...

http://www.mediafire.com/?gminnwwlnny