&gt; The purpose here has been to bring the licensing of Qt more in line with the philosophy of the Free Software movement.<p>&gt; In line with this, the new contract with KDE now removes LGPLv2.1 as a required license for the open source version. Instead, it now requires LGPLv3<p>&gt; This means that all parts of Qt for Application Development can be used under the GPLv3.<p>Looks like things have just moved to LPLV3 and is compatible with GPLV3. Good stuff here.