This used to work as expected but no longer does. I don't have Evolution installed and there is no /apps/evolution/tasks key in gconf.

Consider the following example:

ESourceList * sources;
e_cal_get_sources (&sources, E_CAL_SOURCE_TYPE_TODO, NULL);

This returns nothing (as it seems to just read and parse a gconf key every time it's called). Now try this:

ECal * cal;
cal = e_cal_new_system_tasks ();

This returns a valid ECal object and it contains all my tasks but is hardcoded to load from ~/.evolution/tasks/local/system and does not have a corresponding entry in the source list.

I guess if the above call results in opening an ECal from a fixed location, this location should always appear as a local source. Either that or the behavior should be documented.

The new_system_memos/new_system_calendar seem to behave the same way.

See also bug #546589.