Illustrator CS6 16.0.1 release notes

The following issues have been resolved in this release:

Sometimes, Illustrator quits unexpectedly if you only have read-only permissions on the Preferences folder.
On launching Illustrator, error "Unable to set maximum number of files to be opened" is displayed.
Sometimes, Save for Web does not create images with the specified dimensions.
Copy-paste from other applications does not work as expected if you're using a third-party clipboard manager.
Windows 7 only: Sometimes, Illustrator quits unexpectedly, when you move the cursor inside the Navigator panel.
Selecting All Unused Swatches and deleting them, removes the parent/tint swatch which is not in use.
When using Kotoeri text input methods, you are unable to shift selection to another uncommitted text group using the left/right arrow key.
Saving as PDF/X-4, succeeds even if there are undefined glyphs in the document.
Sometimes, Contextual Alternates do not work consistently. The ligatures displayed in CS6 are different from previous versions.
If standard ligatures and contextual alternates are both enabled, some text may appear missing.
Save as PDF dialog box does not accept any settings if you've already saved the file as PDF with Compression > Compress Text and Line Art option disabled.
Text with drop shadow/outer glow effect has issues with editing in downsaved documents and may cause a crash.
Transform commands do not work as expected, if you use the Transform Patterns option and then enter the Pattern Definition Mode.

Illustrator CS6 16.0.1 Release Notes