Does this mean, that we should not use RF 4.x ?
Not as long as your clients are on IE7. I appreciate that you can't expect to influence your clients overall IT policy but maybe
they need to think about upgrading. The problem is that IE7 is 6 years old now and it wasn't brilliant then and especially in
comparison to modern browsers it's rubbish. IE8 isn't brilliant either but it's still got a hefty market share so you have no choice
but to support it.
For example google have dropped support for IE7 in gmail http://gmailblog.blogspot.co.uk/2011/06/our-plans-to-support-modern-browsers.html.
The problem with IE7 is that it's bug ridden and Microsoft managed to do things a little differently to all the other major browser
developers requiring a fair amount if IE specific workarounds.
Does JBoss offer commercial support if we run into trouble with a certain component in IE 7?