Checkboxes were laid out with fill=HORIZONTAL, stretching the (text-less) JCheckBox across the half-width cell so its click target reached the scrollbar - a near-scrollbar miss-click silently toggled them (this flipped 'DNN remote' off mid-session). Anchor checkboxes WEST at natural size; the rest of the cell is now dead space. Applies to all tabbed dialogs.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>