What is this?

[lligetfa]

Under Device > Status > Power, there is what looks like a dial that changes the pointer and background on mouseover before it is clicked but not after clicking it. Clicking it does nothing as far as I can tell.

[lligetfa]

OK, I swear that I hovered over it until the cows came home and didn't get a tooltip. Of course, just after posting, I now see the tooltip "calibrate" and the words "not calibrated" to the left of it. Also, now clicking it brings up an input box.

I wonder what secret handshake it took to bring that on?

[jakematic]

I wonder what secret handshake it took to bring that on?

Clicking "submit" on the previous post...

[Charlie]

Just had the same expierence after upgrading some firmware.

For anyone else with this problem, press shift+f5 to refresh your browser.
Go to system > config and see if you can see options for snmp. If so you are looking at the correct interface. (I find snmp settings are hidden if your browser caches the old firmware version's page)
Your calibrate button will also work after refreshing, but does nothing if you have not fully refreshed the page.