There have been for long time open enhancement request in SwingX for notification about caps lock being switched on in JXLoginPanel. Over a time it acquired quite few votes (in comparison to your average swingx issue, not that 10 votes is much in absolute numbers) so I thought lets do this, it can't be that difficult.
It have been quite some time since the last release of Swinglabs/SwingX. However it was not due to lack of development. SwingX have been last time released as part of much larger Swinglabs project. That was nearly two years ago.