- Go to settings->manage calendars->which calendar apps?
- Untick Everything except Google API 2.2 the press OK
- Click "Choose Calendars" and untick everything
- Exit settings
- Go to settings->manage calendars->choose calendars
- Tick you calendars and exit settings
Now all should be well in the world of Android Agenda Widget :D
Comments below if you have troubles!

"Haven't Selected a Calendar"
Hi there,
No matter what I do, I CANNOT get this app to now show my "Agenda". All was good until the operating system updated on my Evo, now nothing. HELP Please?
Also . . . how do we now get to the selection of available "sizes" for this agenda? It was also there before & now it's gone . . . there were SEVERAL to chose from.
One option, if you hadn't
One option, if you hadn't configured the widget much, and the above doesn't work, is to uninstall and re-install the application. It should detect the Froyo settings properly on a fresh install!