There is a known problem with the agenda view in the version of GPE Calendar currently in Extras. If the sidebar is disabled then it is likely to crash when entering or leaving agenda view.

If the saved view is the agenda view then you may not be able to start GPE calendar. In that case, your best bet is to just delete the file which stores your optional settings (this is nothing to do with the data stored in your calendar). To do that, start the X Terminal and type in:

Note that there is a dot "." in front of "gpe-calendar". That is just a text file so if you are used to using Linux you could edit the file to either enable the sidebar or change the current view ("day" is a good start).

The bug is fixed in the Beta version of GPE Calendar which is in extras-devel. However, it is not currently ready for full release and problems have been reported with the home page applet (gpesummary). If you want to try the Beta version, see http://talk.maemo.org/showthread.php?t=22219

Graham