In menus for "...", should one use ellipsis sign or just three dots?

Microsoft's reference doesn't say anything, but it seems that currentle everyone uses t开发者_如何转开发hree dots (...) and not the unicode sign (…).

Is it OK, or maybe there are some guidelines I'm not aware of that recommend using the unicode sign?

I think it's safer to use three dots, because some fonts/systems might not interpret correctly the '...' single character.