Can't say for sure, but the reference to "sample rate" is suspicious. You may (intentionally or unintentionally) be using custom import settings with Sample Rate set to something other than "Auto."
Go to Edit > Preferences > Advanced > Importing. Set "Import Using" to either MP3 or AAC (your choice) and put "Setting" to 192 kb/s. Then "OK."
If that does not solve it, pls post back with the import settings you are using. Also, let us know whether you are seeing the problem on all CDs, or only on certain ones. Also, pls verify that you are talking about standard audio CDs.