CSS layout not working

Hi all,

I have just completed the installation of Piwik on my server, which went swimmingly, so to speak. However when the login page came up I thought it looked a bit plain … I ignored this and logged in. Once in I can see there is a problem. For some reason the page layout doesn’t seem to be layout as specified in the associated CSS file.

I can confirm that:

Javascript is working (menu is reacting as expected)
Images are displaying (at the moment limited to small Piwik logo, map of earth and calendar)
CSS file location is correct (‘tmp/assets/f600a8fab30fe233a6a00bdfbdb879d6.css’ when opening this file I can see all of the CSS)

Any feedback is appreciated.