You can find additional information about the Altera Complete
Design Suite at the following locations:

Release Notes - for information about new features, known issues
and workarounds, timing model status, device support status,
revision history and supported versions of other EDA tools, please
refer to the Quartus II Software Release Notes, the Nios II EDS
Release Notes, and MegaCore IP Release Notes, available from the
Literature page of the Altera website.

Errata sheets that describe known issues with Altera MegaCore
functions and Nios II EDS are available from the Literature page
of the Altera website.