Temporary work around! (windows 7, MC version 1.6.2)
If you don't fling the minecraft window to a side of the screen, but instead manually resize each side to where ever you like (without letting windows 7 size it for you) it will hold that position.
to test just hover over the edge of the window, click and hold when you see the "<->" symbol, move your mouse in whatever direction, then switch between programs and back. Minecraft will stay the same size. repeat this for each side to get the desired size and position.
Artimis Fowl
Temporary work around! (windows 7, MC version 1.6.2)
If you don't fling the minecraft window to a side of the screen, but instead manually resize each side to where ever you like (without letting windows 7 size it for you) it will hold that position.
to test just hover over the edge of the window, click and hold when you see the "<->" symbol, move your mouse in whatever direction, then switch between programs and back. Minecraft will stay the same size. repeat this for each side to get the desired size and position.