I have tried to do a GDB backtrace of the problem, following https://wiki.ubuntu.com/Backtrace.
Funny thing: Evo won't crash when sending e-mails or accessing Edit / Preferences when attached to GDB. Well, I'm a newbie, probably that is supposed to happen. 

See below how it went. I also attached the entire backtrace.

---x cut here--------------------------------------------------------------------------------------
effenberg@effenberg-mobile:~$ pidof evolution
19138
effenberg@effenberg-mobile:~$ gdb 2>&1 | tee gdb-evolution.txt
GNU gdb 6.7.1-debian
Copyright (C) 2007 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i486-linux-gnu".
(gdb) handle SIG33 pass nostop noprint
Signal        Stop	Print	Pass to program	Description
SIG33         No	No	Yes		Real-time event 33
(gdb) set pagination 0
(gdb) attach 18659
Attaching to process 18659

(Lots of symbols Loaded and Read. Now I go to evo and try to send an e-mail)

(gdb) continue
Continuing.

(I try to click on Edit / Preferences and then ask GDB to Continue. Cools, Preferences Windows now shows!

Program received signal SIGTRAP, Trace/breakpoint trap.
[Switching to Thread 0xb66b08c0 (LWP 19138)]
0xb6d8ffcc in g_logv () from /usr/lib/libglib-2.0.so.0
(gdb) continue
Continuing.
[New Thread 0xaf3f7b90 (LWP 19182)]


(Ok, now I'll try to write and send an e-mail)
(I click on New Message Icon, Fill the Fields "To", "Subject", write a message and hit send)

[New Thread 0xafbf8b90 (LWP 19183)]
[Thread 0xafbf8b90 (LWP 19183) exited]
[Thread 0xaf3f7b90 (LWP 19182) exited]
[New Thread 0xaf3f7b90 (LWP 19193)]
[New Thread 0xb38b9b90 (LWP 19195)]
[New Thread 0xafbf8b90 (LWP 19197)]
[New Thread 0xb1bfcb90 (LWP 19198)]
[New Thread 0xb2bfeb90 (LWP 19199)]
[Thread 0xb1bfcb90 (LWP 19198) exited]
[Thread 0xafbf8b90 (LWP 19197) exited]
[New Thread 0xafbf8b90 (LWP 19227)]
[Thread 0xafbf8b90 (LWP 19227) exited]
[New Thread 0xafbf8b90 (LWP 19228)]
[Thread 0xafbf8b90 (LWP 19228) exited]
[New Thread 0xafbf8b90 (LWP 19229)]
[Thread 0xafbf8b90 (LWP 19229) exited]

Program received signal SIGTRAP, Trace/breakpoint trap.
[Switching to Thread 0xb2bfeb90 (LWP 19199)]
0xb6d8ffcc in g_logv () from /usr/lib/libglib-2.0.so.0

(Then I ask GDB to continue)

(gdb) continue
Continuing.
[New Thread 0xafbf8b90 (LWP 19245)]
[New Thread 0xb1bfcb90 (LWP 19246)]
[New Thread 0xb23fdb90 (LWP 19247)]
[New Thread 0xb13fbb90 (LWP 19248)]
[New Thread 0xb0bfab90 (LWP 19249)]
[Thread 0xb1bfcb90 (LWP 19246) exited]
[Thread 0xb13fbb90 (LWP 19248) exited]
[Thread 0xb0bfab90 (LWP 19249) exited]
[New Thread 0xb0bfab90 (LWP 19250)]
[Thread 0xb0bfab90 (LWP 19250) exited]

Program received signal SIGTRAP, Trace/breakpoint trap.
0xb6d8ffcc in g_logv () from /usr/lib/libglib-2.0.so.0

(gdb) continue
Continuing.

(Someone kill me please. It actually works on GDB and not out of it...)
---x cut here--------------------------------------------------------------------------------------

Regards,
Effenberg