advice on screen resolution

I'm sure this has been discussed before, but does anyone have any advice on screen resolution?

Last time round my game was playable on a small area so I went with a fixed resolution of 800x600.  This time I could do with as much space as possible (particularly vertical).  So I was going to go with a fixed resolution of 1024x768 .  Is this sensible?  Any pitfalls I should be aware of.

I don't really want to have to rescale all of my graphics etc. to allow different resolutions, but maybe this is a better idea?

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1024x768 fullscreen will work with most laptops; in windowed mode you may not get all the available screen space because of windows decorations.
ok thanks I will probably go for that.  Is it normal to offer several screen resolutions?
It is a good idea to start in widowed mode and allow fullscreen when possible; if you're using bitmaps I don't think is worth it.
1024x768 windowed does indeed cut off a few pixels for me, but fullscreen works fine, I concur with reidrac on starting in windowed mode.
thanks for your comments.  I've decided I'm going to go for a fixed resolution of 800 x 600 since in windowed mode that won't chop off any pixels on my laptop, and I dont want to rely on fullscreen.