[daan]

pulcher is a word with a LOT of meanings, heck, by typing it as Pulcher
( capital letter ) you could be referring to Claudia. Claudia was the wife of an emperor and that emperor decided that Pulcher would refer to his wife
( i think, not sure ).

Anywayz .. pulcher:
1. Beautifull ( house, body, city, word etc. )

2.extraordinary, praiseworthy, incredible ( mind, party etc. )

3. (poetical) Brave
(-Proles pulcherima bello -The young soldiers were very brave during the war.)

4. happy, pleasant (day)

There are a lot more, but those arent very relevant.
Pulcher is allmost allways an adjective.

Incertus Pulcher Imperio.

-Incertus pulcher- match, so we can assume that pulcher is an adjective with Incertus. This translates as beatifull uncertainty.
Imperio means power, command etc. liek Link said, and again its an ablative.

So:
Beatifull uncertainty through power

Or, if you wanna get real technical ( i doubt this is what they meant ) ...
In a poetical way, Pulcher can de a demanding adjective, which may be translated independant in latin. Add a little poetry and use the poetical meaning adn then tou get:
Uncertainty [makes] brave [ with /through] power.

But that one's far fetched.

Anywayz, again .. i think those are the correct translations ... same as Link basically, but he forgot to add that Imperio was an ablative.
Just create your own sentence with it [img]smile.gif[/img]