Today we updated openttd-useful.zip to add an extra library. If you want to compile upcoming releases/nightlies/trunk you have to update.
If you do not compile OpenTTD yourself or you are not using Microsoft's compiler you will not be affected.
As a little Christmas present we present the first beta for 1.0.0. With this version you can run OpenTTD without the original Transport Tycoon Deluxe data files, although you can still use them if you like them more.
We would like to thank everyone who has made this possible.