Ok i've found quite a few bugs such as clicking on an empty area beside a server makes the "choose a server" dialog box appear, which it should only appear when you click connect, but nehow, here are my suggestions:
Please add a Mouse over state on the down/up arrows so that you can hold it depressed and dont have to keep clicking it:) Also add the use of a mouse scroll
Two little things that anoy (yes i know its spelt wrong) me:)