Client is working pretty well for me apart from the cosmetic bugs already reported
I can think of a few linux-specific improvements though.
1) Alt + mouse to control the camera is a bad idea as KDE and possibly others use this to let you move a window without using the title bar
2) more linux-style clipboard handling. ie. highlighting is enough to get it into the clipboard, then middle mouse to paste.
Other than that, it's going pretty well me. Thanks for releasing this.