Upload to somewhere like photobucket or imageshack then post a link.
It may be something to do with ATI cards. My laptop's native resolution is 1280x800, so enabling AA causes artefacts when the game isn't set at a resolution thats a multiple of 640x480, even when using preserve aspect = true. However, when prevent_rounding_errors = true, there are no artefacts with AA & AF up at x16 and it does look much better - I'm happy with this.
The reason I'm confused is because with the SaiNt's High-Res patch (which only supported 1280x960 & 1280x1024) and AA was turned on, the font looked a lot smoother, as did materia slots and such. Although this patch is far superior, the font looks quite jagged still, though marginally better than the original - and I've tried it in 1280x960 (with the bottom cut off, obv). The thing is, it looks a lot better in some screenshots posted here. I'll post a screenshot as soon as I can, I'm using a friends comp atm.