This 1st happened a few weeks ago. Can't remember exactly which version when I 1st noticed it, but I usually get the latest version every day. Anyway, when I start a mission it attempts to load the mission map, I get the flash screen for the map, then back the game jumps back to the geoscape. I thought it was a problem with an individual map so I left that mission on the map and advanced until the next mission and the same thing happened with a different map. Here's a portion of the output.
------- Loading game.so -------
LoadLibrary (./base/game.so)
==== InitGame ====
SV_AssembleMap: Sequential map assembly in 0 ms
CM_LoadMap: "-desert/ +craft_drop_firebird +main_harvester" "-24 -24 0 -24 -24 0"
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ERROR: CM_AddMapTile: desert/craft_drop_firebird has wrong version number (77 should be 78)
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Shutdown server: Server crashed.