It is always possible that side-by-side installation issues exist, and you should have the appropriate safeguards in place (e.g. backup, use a VM, etc.).
In my personal experience, it has worked just fine. For my Tech Ed presentation, I rebuilt my laptop with Visual Studio 2005, 2008 and 2010 all installed side-by-side on Windows 7 x64. I didn't experience any problems.
与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
