error in qstrcmp(const QByteArray &str1, const char *str2)

Starting from Qt 4.4 there is a special implementation for qstrcmp(const QByteArray &str1, const char *str2) which is buggy. Just try to compare two equal strings. From my point of view the line
const char *str1end = str1data + str1.length();
should read
const char *str1end = str1data + str1.length() - 1;

Btw: the "Component/s" box in the issue form is much too small. finding anything is really tedious.