We're seeing some problems with OSX 10.7.2 (The latest update to Lion) and the ResNet Activation system (https://go.resnet.bristol.ac.uk)
The major symptom seems to be that if you've got a Mac, running the latest version of Safari (5.1.1), and the latest version of Lion (10.7.2) then you can't access the activation system to set up your connection. The page appears to load, but is blank. The last couple of computers I've looked at which have the problem can't open the Keychain App either. This may or may not be related!
We're actively investigating this problem, and trying to work out what's going on so that we can fix it. To be honest, we're not making a whole lot of progress at this stage. Safari appears to make the initial connection to go.resnet, but then stops talking to the server halfway through. It's all rather baffling!
Workaround:
We do however have a workaround for the problem. It seems alternative browsers (eg Firefox,Opera or Chrome) can load the activation system fine. So, if you've got an alternative browser, use that to activate your connection then go back to using safari once your connection is active.
If you don't already have an alternative browser on your computer, use a friends computer to download one and then transfer it to your computer by USB stick.
Update 2011-10-26:
I think I've fixed this. Lion users should now be able to activate their ResNet connections with Safari. As a bonus, some customers who were finding the activation system slow may find it to be a bit quicker now.
If you're still experiencing problems activating your ResNet connection, please get in touch with the IT Service Desk.