fadeyev, your first example is a little misleading. Only Safari 3-4 required the border-radius syntax to be declared individually. So really this is how it goes:
/* these two lines for saf 3-4 support */
-webkit-border-top-left-radius: 5px;
-webkit-border-top-right-radius: 5px;
/* all you need for Saf5, Chrome, Op, FF1+, IE9 */
-moz-border-radius: 5px 5px 0 0;
border-radius: 5px 5px 0 0;
That said, I like the project. Just clarifying this. :)
EDIT: given the spec'd shorthand syntax, your shorthand for unique corners seems to conflict `(5px, 0, 0, 5px)`. I'd suggest changing that.
Thanks for pointing this out, you're right that the example is now outdated, though it's probably not too difficult to find more browser specific code to pick on :) I'll change that.
I'm the creator of LESS Elements. Nothing is wrong with Bootstrap, it's just that when I wrote these mixins a while back Bootstrap wasn't yet available.
EDIT: given the spec'd shorthand syntax, your shorthand for unique corners seems to conflict `(5px, 0, 0, 5px)`. I'd suggest changing that.