Command-O does not work as expected when using the Command key button in the Ink palette. Other combinations, such as Command-D or Command-I work as expected.
Symptom
When you write the keyboard equivalent of "Command-O" in Ink, the intended menu command is not executed. In the Finder, for example, the selected item does not open. If you are using an application that has an action assigned to Command-0 (zero), then you might get that action instead.
Solution
Ink allows you to issue the equivalent of keyboard shortcuts by tapping the modifier key buttons in the Ink palette, followed by writing the letter that would normally be used in combination with the modifier key. When you try to enter Command-O, Ink recognizes the input as a zero and not the letter O. Other combinations, such as Command-D or Command-I work as expected.
This document will be updated when more information is available.