So, I thought I'd treat myself to an upgrade from 8.5 Producer to X3 Producer, now that the X series is stable and working well, and I gave it a try when the trial was available. With the discount in the sale, I thought now is the time.
No such luck.
First up, I get through to the checkout process, just to be told this:

Ok. A bit annoying to find that out so late in the process, especially since the sale ends on a Saturday and tech support might not be quick to respond. I guess it's reasonable that they want proof of my previous serial number (although that wasn't necessary when I upgraded from Studio to Producer in the past via retail boxes... strange). Still, I'll click the link and give it a go.

Oops! Someone hasn't been updating the links or ensuring they redirect properly. Not a good idea when it's getting in the way of a potential sale. Still, the support section's down there in column 3, so I'll look for a contact.
I get there, fill in all the details on the contact form, explain that I can't phone tech support for help as the cost of international calls on my cellphone is likely to nearly equal the potential saving I get from the sale so it's not worth it, supply my serial number and explain the problem, hoping it can be resolved in time for the sale, and click submit...

Boom.
So that's why I'm here complaining. C'mon guys, this is a bit shoddy. Can someone over there (a) consider fixing the broken link, (b) make sure your tech support form actually works (or at a minimum, produces a more useful error message when it cannot), (c) reconsider demanding purchase history for upgrades when I never had to do this with a boxed product, and maybe (d) see if I could possibly get this deal somehow, despite having been thwarted so far?