FarFaraway activity on this website has be sparse at best, last checking in on Feb 4th, 17 days ago. According to his sig he has 3 jobs to deal with until November. He doesn't specify which November, but either way I don't think he has time to update HVSS.
Basically, the current problem stems from a change made to how staff weapons drain MP from mobs. So any error prompts from staffs should be expected and are more or less superficial.
I'm more concerned with the all button in the item shop that causes HVSS to fill up a useless HTML code and locking up your browser in the process.
Said useless HTML looks like this.
(IMG:
https://forums.e-hentai.org/uploads/post-7873-1356055562.png)