I have upgraded to Bootstrap 2.1.0 thanks to a patch by Alec Taylor. I have renamed css/bootswatch*.css as css/web2py_bootstrap*.css to avoid confusion.
In the process I have discovered layout.html refereces a bootswatch_ie.css (now web2py_bootstrap_ie.css) and I do not have it. It is required for older version of IE. I think it comes from Angelo. Anybody has it? Can you send it to me? Can you check it still works with IE7 and IE8? --