Description of problem:
I don't know exactly.
I use kmail as the e-mail client. My company has moved to using Exchange2010, and I am connecting to that by IMAP, unlike all the rest of my colleagues. In fact, they kept IMAP just for me.
I have 4 types of problems:
1. Whenever I move mails from my inbox to local folders, it may work correctly or it may hang.
2. Sometimes for unknkown reason, kmail reports that it lost connectivity to server, and then goes into offline mode, then stays in that mode permanently. It is not a network problem, I have checked that repeatedly, I am a network engineer.
3. Sometimes for unknown reasons, either I navigate through mails in local folders or in the imap inbox, kmail goes into thinking about it a lot, and never shows the contents of the mail.
4. Sometimes, when i choose a mail and try to reply it, kmail just crashed alltoghether disapearing from the screen. I suspect in this case that this has to be sth to do with html, usually it happens when in the mail chain there are signatures with pics and/or html, and/or whenever the mail contains a diagram or sth in form of image that shows directly. 

Once one of these 4 problems manifests, killing processes won't take me out of it. I've tried that numerous times. The only thing that works is rebooting (it's a shame if you think we're talking about linux...)
I am currently rebooting 4-5 times per day...

One fifth thing... If before I shut down, I forget the kmail closed but with the icon active, when it starts up again, it's going to make a mess out of everything, it opens twice, makes a mess of itself, and I end up having to reboot again.

I have html enabled, and I need it actually. I am withstanding the disturbance, but I can't mess up the mail-chain of numerous people everytime I need to reply a mail. If I reply a mail-chain without html, the mail looks terrible, like a bomb disaster... and I get customer complaints for this...

Version-Release number of selected component:
kdepim-runtime-4.10.1-1.fc17

Additional info:
backtrace_rating: 4
cmdline:        /usr/bin/akonadi_imap_resource --identifier akonadi_imap_resource_0
crash_function: locking_function
executable:     /usr/bin/akonadi_imap_resource
kernel:         3.7.9-104.fc17.i686.PAE
uid:            1001
ureports_counter: 1
var_log_messages: Mar 25 10:50:52 panos-pc abrt[2863]: Saved core dump of pid 1779 (/usr/bin/akonadi_imap_resource) to /var/spool/abrt/ccpp-2013-03-25-10:50:52-1779 (26730496 bytes)

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 locking_function at ssl/qsslsocket_openssl.cpp:157
 #1 CRYPTO_lock at cryptlib.c:600
 #2 CRYPTO_add_lock at cryptlib.c:628
 #3 int_thread_release at err.c:469
 #4 int_thread_get_item at err.c:499
 #5 ERR_get_state at err.c:1014
 #6 ERR_clear_error at err.c:747
 #7 ssl3_connect at s3_clnt.c:196
 #8 SSL_connect at ssl_lib.c:933
 #9 q_SSL_connect at ssl/qsslsocket_openssl_symbols.cpp:168