Ok, it's a bit hard to explain. After kmail starts I see all my mails in my INBOX. When i afterwards switch to a different folder in my IMAP ressource and then switch back to my INBOX no message at all is listed.

Reproducible: Always

Steps to Reproduce:
1. Restart Akonadi (once the problem occurs it doesn't not vanish until akonadi is restarted)
2. Launch kmail and see Mails in INBOX
3. Select a different folder
4. Select INBOX again
Actual Results:  
I don't see my mails as in step 2.


It seems this does only occur with a specific or at least with one of my mailboxes.
Watching .xsession-errors meanwhile gives the following messages:

This is from step 3:
akonadi_imap_resource_5(30830)/kdepimlibs (kimap) RetrieveItemsTask::triggerExpunge: "INBOX.Junk"
kmail2(30914) MessageList::StorageModel::StorageModel: Using model: Akonadi::EntityTreeModel
[/usr/bin/nepomukservicestub] nepomukstorage(8143)/nepomuk (storage service) Nepomuk2::ResourceWatcherManager::watch: () ("http://www.semanticdesktop.org/ontologies/2007/08/15/nao#hasTag", "http://www.semanticdesktop.org/ontologies/2007/08/15/nao#description") ()
[/usr/bin/nepomukservicestub] nepomukstorage(8143)/nepomuk (storage service) Nepomuk2::ResourceWatcherManager::createConnection: () (QUrl("http://www.semanticdesktop.org/ontologies/2007/08/15/nao#hasTag") ,   QUrl( "http://www.semanticdesktop.org/ontologies/2007/08/15/nao#description" )  )  ()
akonadi_imap_resource_5(30830)/kdepimlibs (kimap) RetrieveItemsTask::onFinalSelectDone: No messages present so we are done
akonadi_imap_resource_5(30830)/kdepimlibs (kimap) RetrieveCollectionMetadataTask::doStart: ".Junk"
akonadi_imap_resource_5(30830)/kdepimlibs (kimap) RetrieveCollectionMetadataTask::doStart: Not refreshing because of timestamp
kmail2(30914) KMKernel::instanceStatusChanged: A Resource started to synchronize, starting a mail check.
kmail2(30914) KMKernel::slotProgressItemCompletedOrCanceled: Last resource finished syncing, mail check done

Those are the messages from step 4:
kmail2(30914) MessageList::StorageModel::StorageModel: Using model: Akonadi::EntityTreeModel
[/usr/bin/nepomukservicestub] nepomukstorage(8143)/nepomuk (storage service) Nepomuk2::ResourceWatcherManager::watch: () ("http://www.semanticdesktop.org/ontologies/2007/08/15/nao#hasTag", "http://www.semanticdesktop.org/ontologies/2007/08/15/nao#description") ()
[/usr/bin/nepomukservicestub] nepomukstorage(8143)/nepomuk (storage service) Nepomuk2::ResourceWatcherManager::createConnection: () (QUrl("http://www.semanticdesktop.org/ontologies/2007/08/15/nao#hasTag") ,   QUrl( "http://www.semanticdesktop.org/ontologies/2007/08/15/nao#description" )  )  ()
kmail2(30914) KMKernel::instanceStatusChanged: A Resource started to synchronize, starting a mail check.
akonadi_imap_resource_5(30830)/kdepimlibs (kimap) RetrieveItemsTask::triggerExpunge: "INBOX"
akonadi_imap_resource_5(30830)/kdepimlibs (kimap) RetrieveItemsTask::onFinalSelectDone: UIDVALIDITY check failed ( -666705594 | 3628261702 ) refetching  "INBOX"
Object::connect: No such signal KIMAP::FetchJob::headersReceived( QString, QMap<qint64, qint64>, QMap<qint64, qint64> QMap<qint64, KIMAP::MessageFlags>, QMap<qint64, KIMAP::MessagePtr> )
akonadi_imap_resource_5(30830)/kdepimlibs (kimap) RetrieveCollectionMetadataTask::doStart: ".INBOX"
akonadi_imap_resource_5(30830)/kdepimlibs (kimap) RetrieveCollectionMetadataTask::doStart: Not refreshing because of timestamp
kmail2(30914) KMKernel::slotProgressItemCompletedOrCanceled: Last resource finished syncing, mail check done

To my view "UIDVALIDITY check failed" seems oddly.