MojoKid writes: "As it turns out, news is this week that the same features that made IE9's hardware-acceleration possible, probably aren't compatible with Windows XP. Microsoft initially dodged giving a straight answer to the question of XP support but has since admitted that the new browser won't be XP-compatible when it launches. This has created a small tempest of protest from those users still using XP, but this is less of an arbitrary decision than some appear to think. It's literally impossible to port Windows Vista/Win 7-style hardware acceleration backwards to XP. Microsoft would have to either develop a workaround from scratch or create a CPU-driven "software mode." Using such a mode could easily max out a CPU or at the very least, negatively impact system speed and battery life."