It's worth mentionning Qt 4.5.x doesn't support GCC 4.4 [1]. Qt 4.6 will add GCC 4.4 support.
[1] Qt breaks strict aliasing rules resulting in memory corruption and miscompilation. -- http://lists.alioth.debian.org/mailman/listinfo/pkg-kde-talk
It's worth mentionning Qt 4.5.x doesn't support GCC 4.4 [1]. Qt 4.6 will add GCC 4.4 support.
[1] Qt breaks strict aliasing rules resulting in memory corruption and miscompilation. -- http://lists.alioth.debian.org/mailman/listinfo/pkg-kde-talk