NOT caused by:
filed trac:#6549
further possible causes:
Overview of http://trac.edgewall.org/query?group=status&keywords=%7Ememory&order=priority trac memory related tickets
Seems that there is high memory usage, but not a memory leak
ignore behaviour on old VPS, as main system is the dedicated server (see #138).
monitor memomry usage on new server, if ok, close this.
(In [330]) re #148, removed pygments svn external, as svn is not available anymore (to be installed manually via easy_install)
(In [326]) re #148, updating to genshi r 786 (memory leak in c lib was removed in r 781
(In [302]) re #148, disable the pdfexport (possible memory leak)