TinyMCE style conflict

Something in my CSS se开发者_如何学JAVAem to be changing tinyMCE's buttons :

Any ideas on how to fix this ?

This is impossible to solve without seeing the full CSS.

The easiest way to find out what the problem is is to inspect the element, in Firefox or Chrome using Right-Click -> "Inspect element" (Firebug needs to be installed in Firefox for this).

The style inspector will tell you where the additional margin or padding comes from.