and i have seen that break it more than a few times.
some times a client will just puke if some error happens in the clients script and if that script works on other pc's then we are left with an unstable app and we do not know why ...
we wind up taking the pc and re-loading the browser to try and fix it. (well the tech on site does anyway).
and it does not fail totally.... it just crashes/hangs when they are in the second or third part of a data entry process.
Also as far as I know silverlight does not run on Linux, does it?