The /link command returns "It appears you already have linked your account. If this is in error, please contact an admin." even for users who are not yet linked. This is hampering some users' ability to receive donator perks across all servers.
All Minecraft account linking errors should now be fixed. Mainly errors based around us migrating our PHP on the forums, which removed some features and screwed up some others.
If anything else persists, please reopen/notify me ASAP!