As far as i know it's difficult to reproduce the save game problems, which makes it difficult to find the cause. I have not heard of a patch that helps everyone, but I had good success with fixing the individual issues. That means looking what exactly is wrong, and fixing it based on the situation.
If you post the some information, i can see if there's anything suspicious in your installation.
Please follow the instructions to run the Support Tool
and attach the resulting "support_data.zip" to your next reply in this thread.