I have a weird situation with my sharepoint css.

It is deployed as part of a .wsp solution and up until now everything has been fine.

The farm it deploys too has a couple of webfront ends and a single apps server and SQL box.

The symptom is that if I deploy the solution, then use a webbrowser to view the page it has no styles, and if I access the .css directly I see the first 100 or so bytes of the .css.

However if I go into sharepoint designer and look at the file it is looks fine, and if I check it out and publish it (customising the file but not actually changing anything in it) then the website works fine and the css downloads completely.

There is some fairly complex caching on the servers Disk based and object caches. as far as I can tell I have cleared these (and an issreset should clear them anyway... shouldn't it?)

I have used this tool to clear the blobcache from the whole farm http://blobcachefarmflush.codeplex.com/