Tayeule, the support description says 1.33 but you download the 1.34 with 10.3 MB (I did it yesterday). Info will be updated on Monday. Did you read Lar's post? Only saves from earlier versions that haven't been saved into 1.33 version will work.
Kiya
Wait, I'll include the link. Trust me, it IS 1.34.
Patch link, click here Lar: The official announcement will come on monday, but if you go now to the support section and download the patch which is marked as v1.33 you will in fact be downloading v1.34 which solves the black map/resetted world problem. The following applies:
If you apply the updated patch and load savegames made prior to v1.33 you will encounter no more problems.
If you had loaded savegames made with v1.33 after starting a new game with v1.33 you will also not encounter any problems.
If you have made a savegame in versions before v1.33, then loaded that savegame in v1.33 and saved in v1.33, that savegame is potentially corrupt. The best thing is to revert to one of the savegames made earlier with v1.32 or before.