In Admin Tools, I activated the SEO LInks tool to Combine CSS Files. The page does not fully load the first time, but when I reload the page it is perfect. When I turn off the CSS combining feature, the page loads properly on the first load.
In Firebug >Net, I cannot discern any errors.
I do notice however that, when the combine Css is active, that during the first (incomplete) page load, one of the images starts to load at the same time as the combined CSS file, and in the second page load (which looks good), the combined css file finishes loading before that image loads.
I have deactivated the System Cache and Gzip. Rokgzipper is not installed. Rokbooster is installed but inactive.