It seems that with this particular font (it's one of the Ubuntu fonts; I can't tell which one exactly because Chrome's debugger doesn't tell me which font-family won the CSS battle) the letter 'W' (both cases), at the default zoom level and typically with smaller sizes, will render very oddly: (open the image in a new tab)
The right-hand side of the letter is totally wrong. Changing the zoom levels will mitigate (but not eliminate) the issue.
Does anyone know how to fix this? It doesn't happen on Firefox or IE so I assume it's not an issue with the font itself.