Both loads in 2 seconds for me.
I think its related to another problem I am having. I have contacted 'gallery@greenfoot.org' to look into it. Thanks.
EDIT: I think I will try re-uploading my latest update to see if I can resolve it myself.
Tried re-uploading new version -- still problem persists.
Tried reverting back to older version -- problem remains.
No luck trying to resolve the issue myself. Re-uploaded newer version.
Waiting on Greenfoot team.
We're looking into both. I can confirm the scenarios fail on my mac (Java 6), but they work on my desktop (which is Java 7).
Ok, the 'get data' link should now work. We're not sure yet about why the scenarios won't start on some machines - still looking into that!
@davmac, there is one other peculiar thing: the sum of view of my individual scenario adds up to one more than what is showing under 'Popular Users'. Have no idea if this is related or not. Am I the only one experiencing this sort of difficulty right now (refering to some scenarios not loading on-site)?
Think I've sorted it out - a configuration issue as part of a transition to a new server (you may notice the site has been a lot faster/more responsive for the past few days...). For some reason, some versions of Java didn't like it, while others didn't care. In any case, I think your scenarios should work now (if not, give it 24 hours and try again - part of the fix involved a DNS change, which can take a while to propagate).
@davmac, Thank you. I am no longer experiencing the problem of not having some scenarios appear to partially load (or compile) and freeze on the site.