Issue: [h] tag not working

It sounds like a possible add-on conflict. If you can submit a Ticket Support service, we can investigate the matter for you.

I tried to submit a ticked but I'm not sure if it worked, an error message was being displayed quickly when I submitted, I'm not sure if the ticked was created or not :S

The issue with the [h] tag is likely a conflict with the version of BBCodes & Buttons Manager that you're using. Please upgrade to a newer version of that add-on, as it has fixed the issue with breaking other add-ons' BB-Codes in a newer version.

As for the slowness, I've narrowed it down to Nodes As Tabs. I've seen this issue before, but was not able to reproduce it on a test install. I haven't seen another report of it for a long time, so I thought maybe a newer release of Nodes As Tabs resolved the issue. It seems you are using the newest release, so I will have to investigate this. I've sent you a PM about this.

Marking this as fixed in the next release. While the issue was most notable with Nodes As Tabs, it was related to a potential performance issue in VaultWiki where something that probably should be cached wasn't being read from cache. However, this change is not particularly innocuous. It's possible the fix (to read style template parameters from a cache) is not entirely reliable because the values of the parameters might change within the same page load. Please let me know if you notice anything strange. I will keep my own eyes open.

A proper fix (not involving a cache at all) would require a significant refactoring of VaultWiki that I am hesitant to do so close to a stable release. I will open a task to have it done around 4.1.

I have noted so far that the change has resulted in roughly a 25% performance improvement on XenForo platforms even if VaultWiki is the only add-on installed.