Hi guys, I believe you've both experienced this bug: http://getsatisfaction.com/firemint/topics/all_data_profile_suddenly_erased_from_my_iphone_3g. Unfortunately there isn't currently a fix for this issue. We are working hard on a way to save your data to your Cloudcell account which will be available in the next update. Please see the "Still focused on Real Racing and Real Racing HD" section of the latest blog post on our website here for more information.
*Sigh* Well, if I can be of assistance, the data was wiped pretty much straight after downloading the newest version of the game. I am now testing if it has affected anything else... Well, the controls were reset to method A which was strange.