Yes, yes, I know I asked for the upgrade, but it seems as if the upgrade to the latest evolution in Rawhide has caused me to lose the Summaries on my tasks :(
I'm seeing this too on one machine; I get "Due Date" and "Completion Date" columns, but no "Summary" column. If I right-click and selecting "Add a column..." it doesn't show up there either evolution-2.4.2-2 evolution-data-server-1.4.2-1 Works for me one another machine, also with evolution-2.4.2-2 evolution-data-server-1.4.2-1 though.
I have: evolution-2.4.2-2 evolution-connector-2.4.2-1 evolution-connector-debuginfo-2.4.2-1 evolution-data-server-1.4.2.1-1 evolution-data-server-debuginfo-1.4.2.1-1 evolution-data-server-devel-1.4.2.1-1 evolution-debuginfo-2.4.2-2 evolution-devel-2.4.2-2 evolution-webcal-2.4.1-1 I also do not have the Summary column in add a column no matter what I try. This seems to happen on the Calendar view of the Tasks as well, so it looks like it is more than just a UI issue.
I'm now seeing this problem on both machines, package versions as before in comment #1. I think that I may have had parts of an older e-d-s package running on the machine where it was working (old e-d-s processs, perhaps old shared libraries?)
*** Bug 175174 has been marked as a duplicate of this bug. ***
(note that 175174 has some other additional useful info)
Found it upstream; apparently fixed in 2.4.2.1, though there hasn't been an official tarball release of that: http://bugzilla.gnome.org/show_bug.cgi?id=323042 Probably fixed in 2.5.2, and that's going through the buildsystem now...
Works for me with the latest rawhide package (2.5.2); so I'm going to close this one. Please test and reopen it if it's still not working for you. Thanks.