The fix is available in the alpha 1 preview release of Onboard 0.99.0. Thus, I am marking this bug as Fix Released. Please, do not hesitate to reopen it or file a new bug if this problem is still an issue for you. 


onboard (0.99.0~alpha1~tr1190-0ubuntu1) raring; urgency=low

  * New upstream alpha release. (LP: #1089396)
    + Fix Onboard becoming empty when system font dpi changes

 -- Francesco Fumanti <email address hidden>  Wed, 12 Dec 2012 21:33:43 +0100

onboard (0.99.0~alpha1~tr1188-0ubuntu1) raring; urgency=low

  * Sponsorship request for Ubuntu Raring (LP: #1089396)
  * debian/control: raise virtkey run dependency to 0.63.0 or above
  * debian/patches: refresh patch and change default theme
  * Onboard requires now virtkey >= 0.63.0
  * Add example file with system defaults for the nexus7
  * Various changes to get acceptable speeds on the nexus7 (LP: #1070760)
  * Add docking feature (LP: #405034)
  * Add sliding feature for docking and auto-repositioning
  * Add multitouch support
  * Add a toggle to stop listening to touch events in case of many problems
  * Add popup on long press for key variants like diacritics
  * New option to choose popup vs repeat for keys with variants
  * New gsettings key for the popup delay
  * Make move, frame and touch handles work on the nexus7
  * Perform simulated clicks on correct touch position
  * Auto-release pointer grab after timeout in case nexus7 is unresponsive
  * Fix xserver memory leaking
  * Improve speed when typing and moving the pointer (LP: #1055448)
  * Fix rendering being slowed by emboss effect on keycaps (LP: #890221)
  * Fix for not being able to move/resize Onboard on touchscreens (LP: #959035)
  * Have Onboard respect launcher icon size (LP: #1078554)
  * Auto-show Onboard by clicking already selected text entries (LP: #1078602)
  * Make default shortcut for language/layout work from Onboard (LP: #1078629)
  * New design of the Preferences dialog with more options (LP: #1053496)
  * Disable click buttons when mousetweaks is not installed
  * Add D-Bus service to show and hide the keyboard (LP: 1032042)
  * Don't export dbus service for embedded instances
  * Set NumLock's default sticky behavior to LOCK_ONLY
  * Keep state of NumLock across restarts
  * New attribute in layout files for sticky key behaviour
  * New layout tags key_template and keysym_rule defining keysym-specific labels
  * New window tag for color schemes to define border of popups
  * New layout tag for language specific overrides in the layouts
  * Move common key definitions into template for import by layout files
  * Sync modifier states of Onboard with changes by hardware keyboard or tools
  * Fix keys not re-rendered when releasing latched modifiers (LP: #1069990)
  * Send key strokes for all modifiers (LP: #1067797)
  * Blacklist Ctrl-LAlt+Fn keys by default
  * Add alternative key generation by at-spi2
  * Try to improve struts handling for metacity and mutter
  * Fix getpreferredencoding hack, by Matthias Klose
  * Build for all python3 versions, by Matthias Klose
  * Add work arounds for some problems with the search box of firefox
  * Improve startup sequence to fix Onboard showing up sometime at position 0.0
  * Make scanning work out of the box on the nexus7
  * Small changes to some themes
  * Add new Nightshade theme
  * Add keystroke width to the theme settings
  * Highlight pressed keys longer for better visibility on slow computers
  * More visual tweaks
  * Several code cleanups

 -- Francesco Fumanti <email address hidden>  Wed, 12 Dec 2012 14:47:19 +0100