Bugfix release 0.5.1

There is a new bug-fix release. There are no new features in this release.

04/08/2003 - Version 0.5.1
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- Fix for bug 716847 (http://sourceforge.net/tracker/index.php?func=detail&aid=716847&group_id=68316&atid=520799)
- Fix for bug 717392 (http://sourceforge.net/tracker/index.php?func=detail&aid=717392&group_id=68316&atid=520799)