Guild Wars and ArenaNet community manager Regina Buenaobra has announced that due to issues with the Xunlai House Tournament point distribution on June 18th, the decision has been made to temporarily halt Xunlai until the error has been completely resolved. Apparently, some players were getting the incorrect amount of points, while others weren't getting any points.
According to ArenaNet, they have the correct point amounts for May and will be making sure everyone gets the proper amount, whether or not they reported a problem with their points. Currently, there's no date on which Xunlai will be restored, but Regina makes it very clear that they're working hard on getting the issues ironed out.
It's not a fun situation for anyone, but we'd just like to say good on ArenaNet for jumping on the issue like a frenzied lion on a juicy antelope. Hopefully the dates for May point reissues and Xunlai's reopening aren't too far in the distance.