[Windows] Scrollbar sensitivity seems very low

Sensitivity on scrollbars seems to be very low (it takes a lot of scrolling to go down one line). This is specifically for scrollbars on UIs; ingame, scrolling to zoom in or out seems to be at a good speed.

Version 0.2.0d.
Mouse: Microsoft Wireless Mobile Mouse 4000, using mouse and keyboard center
Display resolution: 1366 x 768 (small enough that a lot of UIs need scroll bars), should be possible to also run into this in windowed mode.