A while back I opened up a support ticket because I couldn't access Horizons. Funnily enough, after some playing around I ended up getting it working, but the problem still remains, even after the ticket was closed.
The problem I speak of is accessing Horizons from certain IP addresses. Any attempts to access from the 61.0.0.0 IP range and above (not sure to what threshold) is DENIED by the Horizons site! Since my IP tends to swing between 61. and 59. I occasionally still have to reset my IP before I can play.
Now while this poses little issue to me, it IS an issue for Horizons, especially if they wish to build the player base. I've tried it with several friends, and 2 out of 3 had the same issue getting through... now you can imagine the player base implications when many potential players can't even access the site!
So yeah, I thought I'd post it here rather than opening another ticket so that the HZ staff can read about and fix it at their leisure, though it is obviously a fairly high priority "bug".