Backup your saves folder at regular intervals. This evening I spent 5 hours getting my MP online rank up from 8 to 16. Now I have lost all progress 
All I did was quit the game as normal then when I returned it said save games are corrupt unable to load despite nothing whatsoever changing on the PC so I have lost all that progress as well as 3 achievements which appear on my GFWL profile but are not unlocking on the GFWL servers.
I put this down to Dirtnet servers being pure crap as they keep dropping connections without telling you then you lose all online progress. Seen several other players have similar issues as well with saves becoming corrupt. Obviously this game was not even tested properly as savegames is a pretty basic thing so makes you wonder what else is broken & waiting to be discovered by unsuspecting players
CM may as well not bother making these games for PC anymore as this one is designed for 12 year olds & having a broken save system is the biggest insult of the lot (after the highly consolised nature of the actual game).
All I did was quit the game as normal then when I returned it said save games are corrupt unable to load despite nothing whatsoever changing on the PC so I have lost all that progress as well as 3 achievements which appear on my GFWL profile but are not unlocking on the GFWL servers.
I put this down to Dirtnet servers being pure crap as they keep dropping connections without telling you then you lose all online progress. Seen several other players have similar issues as well with saves becoming corrupt. Obviously this game was not even tested properly as savegames is a pretty basic thing so makes you wonder what else is broken & waiting to be discovered by unsuspecting players
CM may as well not bother making these games for PC anymore as this one is designed for 12 year olds & having a broken save system is the biggest insult of the lot (after the highly consolised nature of the actual game).
