Yes, you can say that it's half baked. The 64-bit Windows version doesn't
work as well as the 32-bit version and the 64-bit version for other OSes.
It's a matter of code migration issue since it's not an easy thing to make a
64-bit version from a 32-bit program, considering that the program is
initially designed for 32-bit. OS specific 64-bit restrictions also
complicate things even more. This might also be the case for other browsers.
For Opera, the whole /original/ Opera is being converted to Opera-WebKit.
This might also mean that the original Opera will be dead, depending how the
/new/ Opera is implemented. The current development of original Opera has
stalled except maybe, for important security updates in the future.