kmail crash

Hello

since yesterday I am suddenly not longer able to use kmail, because it
crashes right at the beginning.

I am using Fedora Core 6 with kdepim.i386
6:3.5.6-0.2.fc6

Starting kmail in a terminal I receive:

../kmail
QGArray::at: Absolute index 0 out of range
[uwe@uwe bin]$ KCrash: crashing... crashRecursionCounter = 2
KCrash: Application Name = kmail path = <unknown> pid = 21062


,----[ /home/uwe/kmail_error_2.txt ]
| (no debugging symbols found)
| Using host libthread_db library "/lib/libthread_db.so.1".
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| [Thread debugging using libthread_db enabled]
| [New Thread -1208617264 (LWP 21062)]
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| [KCrash handler]
| #6 0x42a7b1a0 in KMFolderMaildir::readFileHeaderIntern ()
| from /usr/lib/libkmailprivate.so
| #7 0x42a7bcd6 in KMFolderMaildir::createIndexFromContents ()
| from /usr/lib/libkmailprivate.so
| #8 0x42a77a8c in KMFolderMaildir:pen () from
| #/usr/lib/libkmailprivate.so
| #9 0x42b2b4e2 in KMFolderIndex::fillMessageDict ()
| from /usr/lib/libkmailprivate.so
| #10 0x429d006e in FolderStorage::invalidateFolder ()
| from /usr/lib/libkmailprivate.so
| #11 0x429d0115 in FolderStorage::readFolderIdsFile ()
| from /usr/lib/libkmailprivate.so
| #12 0x429d0141 in FolderStorage::registerWithMessageDict ()
| from /usr/lib/libkmailprivate.so
| #13 0x429b192b in KMFolder::KMFolder () from /usr/lib/libkmailprivate.so
| #14 0x429ee391 in KMFolderDir::reload () from /usr/lib/libkmailprivate.so
| #15 0x429eff15 in KMFolderMgr::setBasePath () from
| #/usr/lib/libkmailprivate.so 16 0x429f01ff in KMFolderMgr::KMFolderMgr ()
| #from /usr/lib/libkmailprivate.so 17 0x42a9046a in KMKernel::init () from
| #/usr/lib/libkmailprivate.so 18 0x08049fe1 in QObject::checkConnectArgs ()
| #19 0x4f74ef2c in __libc_start_main () from /lib/libc.so.6
| #20 0x08049db1 in QObject::checkConnectArgs ()
`----

I already deleted the *.index and *.ids files but that had no significant
effect. kmail reconstructs the .ids and .index files in the root mail
directory and then crashes.
When I delete the kmailrc file, kmail comes up and I can configure it but I
can't access my mails.

Is there anyone with a hint or a good idea?


thanks

Uwe