Qt 2.0 Beta3 is not binary compatible with Beta2, this means that any programs linked with Beta2 must be recompiled. The most important fixes since Beta 2: platforms 64-bits, FreeBSD and gcc 2.7 fixes QLayoutIterator/QGLayoutIterator The custom layout API has been changed: void removeCurrent() has been replaced by QLayoutItem* takeCurrent(). QLabel The functions setMargin() and margin() have been renamed to setIndent() and indent, to avoid collision with QFrame::setMargin(). QAccel Non-latin1 accelerators are now supported. QTranslator/findtr/msg2qm/mergetr All reported bugs fixed and improvements made. Rich Text Many improvements and fixes such as supressed warnings in the QBrowser example. Support for logical font sizes. QApplication lastWindowClosed() now works with virtual desktops. Desktop settings on Windows improved. QScrollView / QMultiLineEdit Speedups with a new widget flag: WNorthWestGravity. QPopupMenu / QMenuBar Speedups, less flicker.