diff --git a/configuredialog.cpp b/configuredialog.cpp
index 6b663d078..24ca28267 100644
--- a/configuredialog.cpp
+++ b/configuredialog.cpp
@@ -477,6 +477,7 @@ void IdentityPage::slotRenameIdentity() {
 void IdentityPage::slotRenameIdentity( QListViewItem * i,
 				       const QString & s, int col ) {
   assert( col == 0 );
+  Q_UNUSED( col );
 
   IdentityListViewItem * item = dynamic_cast<IdentityListViewItem*>( i );
   if ( !item ) return;
diff --git a/kmfolder.cpp b/kmfolder.cpp
index 85c0b7b8b..2291d7785 100644
--- a/kmfolder.cpp
+++ b/kmfolder.cpp
@@ -332,7 +332,9 @@ bool KMFolder::canAddMsgNow(KMMessage* aMsg, int* aIndex_ret)
   KMFolder *msgParent = aMsg->parent();
   if (aMsg->transferInProgress())
       return false;
-#warning "FIXME : extract tempOpenFolder to some base class"
+#ifdef __GNUC__
+#warning FIXME : extract tempOpenFolder to some base class
+#endif
   if (!aMsg->isComplete() && msgParent && msgParent->folderType() == KMFolderTypeImap)
   {
     FolderJob *job = msgParent->createJob(aMsg);
diff --git a/kmfoldercachedimap.cpp b/kmfoldercachedimap.cpp
index 59bf4f727..7daf7a593 100644
--- a/kmfoldercachedimap.cpp
+++ b/kmfoldercachedimap.cpp
@@ -253,6 +253,7 @@ bool KMFolderCachedImap::canRemoveFolder() const {
 /* Reimplemented from KMFolderDir */
 int KMFolderCachedImap::rename(const QString& aName, KMFolderDir *aParent) {
   assert( aParent == 0 );
+  Q_UNUSED( aParent );
 
   if ( aName == name() )
     // Stupid user trying to rename it to it's old name :)
diff --git a/kmfoldersearch.cpp b/kmfoldersearch.cpp
index af72180f6..d6e68518f 100644
--- a/kmfoldersearch.cpp
+++ b/kmfoldersearch.cpp
@@ -629,6 +629,7 @@ FolderJob* KMFolderSearch::doCreateJob(KMMessage*, FolderJob::JobType,
 {
     // Should never be called
     assert(0);
+    return 0;
 }
 
 FolderJob* KMFolderSearch::doCreateJob(QPtrList<KMMessage>&, const QString&,
@@ -636,6 +637,7 @@ FolderJob* KMFolderSearch::doCreateJob(QPtrList<KMMessage>&, const QString&,
 {
     // Should never be called
     assert(0);
+    return 0;
 }
 
 const KMMsgBase* KMFolderSearch::getMsgBase(int idx) const
@@ -911,6 +913,7 @@ KMMsgBase* KMFolderSearch::takeIndexEntry(int idx)
 KMMsgInfo* KMFolderSearch::setIndexEntry(int idx, KMMessage *msg)
 {
     assert(idx >= 0 && idx < (int)mSerNums.count());
+    Q_UNUSED( idx );
     return msg->parent()->setIndexEntry(msg->parent()->find(msg), msg);
 }
 
diff --git a/kmheaders.cpp b/kmheaders.cpp
index ef5c63b1e..df0dd8e95 100644
--- a/kmheaders.cpp
+++ b/kmheaders.cpp
@@ -1042,8 +1042,7 @@ void KMHeaders::msgAdded(int id)
   CREATE_TIMER(msgAdded);
   START_TIMER(msgAdded);
 
-  KMMsgBase* mb = mFolder->getMsgBase( id );
-  assert(mb != 0); // otherwise using count() above is wrong
+  assert( mFolder->getMsgBase( id ) ); // otherwise using count() above is wrong
 
   if (mNested != mNestedOverride) {
     // make sure the id and subject dicts grow, if necessary
diff --git a/kmsender.cpp b/kmsender.cpp
index 998574016..64fa8f227 100644
--- a/kmsender.cpp
+++ b/kmsender.cpp
@@ -932,6 +932,7 @@ void KMSendSendmail::wroteStdin(KProcess *proc)
   int len;
 
   assert(proc!=0);
+  Q_UNUSED( proc );
 
   str = mMsgPos;
   len = (mMsgRest>1024 ? 1024 : mMsgRest);
@@ -955,6 +956,7 @@ void KMSendSendmail::wroteStdin(KProcess *proc)
 void KMSendSendmail::receivedStderr(KProcess *proc, char *buffer, int buflen)
 {
   assert(proc!=0);
+  Q_UNUSED( proc );
   mMsg.replace(mMsg.length(), buflen, buffer);
 }