quanta started to disappear on me after my upgrade to ubuntu 9.10.  The error when launched from the CLI would look like this
<pre>quanta: symbol lookup error: /usr/lib/libqt-mt.so.3: undefined symbol: _ZN11QTextFormat6getKeyERK5QFontRK6QColorbNS_17VerticaLAlignmentE</pre>
 
I have no idea what is causing this but need my quanta so I will be actively working on this.  Also, others may come here so I am opening my site up to anonymous comments.
 
UPDATE: The solution to this was to 'reinstall' the libqt-mt via synaptic.