Description of problem:

Upgraded to evolution 2.5.2, old calendar worked fine for previous versions of
evolution, but now, whenever I try to open the calendar, it crashes on me.

I've attached the backtrace.

Here is the (annotated) console log:

/* Starting in mail mode */

[spot@swoop ~]$ evolution -c mail
adding hook target 'source'
priv (MemosComponentnPrivate) == 0x888b818

(evolution:4930): camel-WARNING **: camel_exception_get_id called with NULL
parameter.

(evolution:4930): Gdk-CRITICAL **: gdk_gc_set_foreground: assertion `GDK_IS_GC
(gc)' failed

/* OK, in mail mode, now, going to calendar mode */

(evolution:4930): Gdk-CRITICAL **: gdk_gc_set_foreground: assertion `GDK_IS_GC
(gc)' failed

(evolution:4930): Gdk-CRITICAL **: gdk_gc_set_foreground: assertion `GDK_IS_GC
(gc)' failed

(evolution:5191): calendar-gui-WARNING **: e-cal-model.c:1486: Unable to get query

(evolution:5191): calendar-gui-WARNING **: e-cal-model.c:1486: Unable to get query

(evolution:5191): calendar-gui-WARNING **: e-cal-model.c:1486: Unable to get query

(evolution:5191): calendar-gui-WARNING **: e-cal-model.c:1486: Unable to get query

(evolution:5191): calendar-gui-WARNING **: e-cal-model.c:1486: Unable to get query

/* Here, we crash. */