Not that that means that you should switch or anything. Linux is often better on x86 hardware. It supports way more stuff. And some of the stuff Solaris supports is a little flaky. But if you find a combination of Intel hardware that works right under Solaris, it tends to be more stable, in my experience. Linux seems to have more random glitches than Solaris does. But, then, you have to spend a lot of time finding that right combination to begin with. So I'd use Linux most of the time on x86 machines anyway. Really, I'd tend to use a BSD, but between the two....

And, BTW, you can download Solaris right off the net. You don't even have to pay for shipment anymore.