Nope. Works fine so long as you aren't using a custom chat. I had this issue in Starvation Mod until I disabled the mods custom chat then it worked fine. Also make sure you have it enabled in the xml and you are typing /day7 and not /7day.
<Command Command="hubcity" Response="tele {EntityId} 0 -1 0" DelayBetweenUses="30" />
That's a basic one that should teleport you to coords 0,0 at the surface when you type /hubcity in chat (with a 30 second cooldown).
I worked/interacted with lowlatency back in November when I had a rental with them. I had them add the servertools mod as you cannot manually update allocs or any mod on their server (has to be pushed by them). Problem is that everytime there was an update to servertools I had to message them to update the link accordingly. I have since moved on to BF but you will need to message them to update the link everytime there is an update.
I love this tool (especially for how small a footprint it takes to run and how quick it responds). One request if at all possible is to have multiple teleports set by users? I know the server admin can add them manually using custom commands but maybe if we could have a set number (say 3 or 5) that the users can set themselves or have the amount configurable by the admin.
Thanks!