4.0 Preview
Please see this announcement regarding using the 4.0 preview. If you are having any issues with the 3.x client, please uninstall it and upgrade to the 4.0 client.
Bugs
Most of the common issues that you will be having with CC v3 are fixed in v4. If you are experiencing issues, please uninstall v3 and install v4 as mentioned in this announcement.