In QLinkedList const_iterator documentation (http://doc.qt.nokia.com/4.7/qlinkedlist-const-iterator.html) there is a sentence:

"If you want modify the QLinkedList as you iterate over it, you must use QLinkedList::const_iterator instead."

It should be:

"If you want modify the QLinkedList as you iterate over it, you must use QLinkedList::iterator instead."