Description of Problem:
If you select a thread (i.e. to mark all as "read"), no functions in the 
View->Go To menu will work.  This is a regression; up through some versions 
of 1.5.x, I was able to quickly clean up my mailing list folders by 
repeatedly doing Ctrl-H (mark thread), Ctrl-K (mark as read), period (go to 
next unread).

Steps to reproduce the problem:
1. Ctrl-H: Select a thread
2. Period: Go to next unread message

Actual Results:
Nothing happens.

Expected Results:
The next unread message would be selected, as before.

I don't see why any of the View->Go To actions should be disabled when a 
thread is selected; Go To->Next/Prev Message is greyed out in this case, 
which *does* reflect the disabled behaviour--but the rest are not greyed 
out, and simply do not work.

Note that if you manually select the thread (using click + shift-click), Go 
To Next Unread (and all other Go To actions) works fine.

How often does this happen? 
Always!

Additional Information:
gtkhtml3.1-3.2.3.0.200410120626-0.snap.ximian.6.1
libgtkhtml3.1_11-3.2.3.0.200410120626-0.snap.ximian.6.1
evolution1.5-2.0.2.0.200410120626-0.snap.ximian.6.1
evolution-data-server-1.0.2.0.200410120626-0.snap.ximian.6.1
libsoup2.2-2.2.1.0.200410120626-0.snap.ximian.6.1
libgal2.2_0-2.1.14.0.200408240630-0.snap.ximian.6.1
libgal2.2_1-2.2.3.0.200410120626-0.snap.ximian.6.1