A JButton, a mnemonic, and a missing action event.

Does anybody have a clue as to why a JButton, when activated by a mnemonic, would highlight the button onscreen but NOT call the button's actionPerformed() method?
Specifically, I have a (huge) application that consists of a main JFrame and any number of internal JDialogs launched (mostly) by buttons and menu items. The situation is arising when a dialog is closed without expressly placing focus on a component parented by the main frame. Once the dialog closes you can hit a mnemonic key combination and the button associated will 'depress' (turn grey) but not reset back to it's normal state, nor will the associated actionPerformed be called. A second usage of the mnemonic immediately following the first one WILL activate the button (and reset the visual state). This behaviour can be avoided by clicking on a component (other than a button) on the main frame before trying the mnemonic the first time, but that's not acceptable from a user's standpoint (this job would be sooo much easier without them! ;) )
I know it's not possible to get specific without code examples (which aren't possible because I can't narrow down were it's happening in the 900+ GUI-side scripts) but I'd really appreciate anyone who could point me in the right direction to start investigating this phenomenon. Thx.

Hi Yuki,
Yeah, after I turn on detail JSF debugging as instructed by the book Core JavaServer Faces, I figured out I had a validation error. That solves the mystery.
Thanks,
Edmond

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[/b]
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user10911131 wrote:
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A JButton, a mnemonic, and a missing action event.

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