Since upgrading to Oneiric, double-clicking on any date in the Calendar applet no longer opens Evolution to that date. Instead, nothing happens. Verifying in the Overview section of control-center confirms that Evolution is selected as the calendar application, so it must be caused by something else.
DistroRelease: Ubuntu 11.10
Package: evolution-data-server 3.1.92-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
Uname: Linux 3.0.0-11-generic i686
Date: Wed Sep 21 17:41:44 2011
UpgradeStatus: Upgraded to oneiric on 2009-09-14 (737 days ago)