We are watching this post closely so if you run into similar issues with the compiler upgrade that occurred in 10.0 please post them here and/or file a service request at this location and mention my name "Jarrod" in the description so that I can keep an eye on the issue: https://www.altera.com/myaltera/mal-index.jsp while referencing this post.
If you file a service request please attach your system and software if possible to help us re-create the issue (this always helps any time you file a service request). A minimal set of files is always welcome so if you can re-produce this issue with a minimal set of components in your system that always helps us and if you have any additional information please provide it via notes in the service request.
Thank-you,
Jarrod - Embedded Applications Altera