- the red buttons sometimes gets broken for me on Chrome (27) - the text on them is either invisible (log in on the main page) or messed up (one letter over another)
- text is rendered poorly on Chrome and Opera, probably a fault of the browser+font combination, maybe you can try to experiment with different fonts
- did you think about something different than read/unread model? it was something that was irking me about Google Reader or now with Netvibes - the point of RSS reader is not to read it all, at least not when you have thousands of items to read