+Changes in behaviour not resulting in compilation errors, please read this!
+---------------------------------------------------------------------------
+
+- For all wxInputStreams, Eof() becomes true after an attempt has been made
+ to read _past_ the end of file.
+- wxFileName::DirExists() checks if the path of the file is a directory, not
+ if the whole name is a directory.
+- wxDialog::CreateButtonSizer() may return NULL now, please see the manual.
+- wxStaticBoxSizer now deletes the associated wxStaticBox when it is deleted.
+- wxArray::Alloc() now works as reserve() and does not clear the array any more
+- Windows calling CaptureMouse() are now required to handle the
+ wxEVT_MOUSE_CAPTURE_LOST event and not call ReleaseMouse() in this case.
+- wxInputStream::GetC() now returns an int in the range 0 - 255 on success
+ instead of a char the range -128 - 127.
+- A sequence returned by wxFileSystem::FindFirst()/FindNext() may now be
+ be scoped to a single instance of wxFileSystem.
+- Streams returned by wxFileSystem::OpenFile are not necessarily seekable by
+ default. Open with flags wxFS_READ | wxFS_SEEKABLE if seeking is required.
+
+
+Changes in behaviour which may result in compilation errors
+-----------------------------------------------------------
+
+- Some classes (notably wxBitmap and wxImage) don't define operator==() as it
+ used to work in somewhat unexpected way as it compared only internal pointers
+ and not the object data. The code using it will have to be updated:
+ * If the object was compared with wxNullXXX, use IsOk() method instead
+ * If valid object need to be compared, use IsSameAs() to reproduce the old
+ behaviour or change the code to avoid comparing bitmaps &c.