I have built a custom theme using zen.
For my image galleries, I have code in the "fields.css" file for my theme, to float my images left.
It works fine as long as aggregate and compress css files is turned off.
As soon as I turn this on, the css no longer is showing in firebug, and my css is not applied any longer, and my images are no longer floated left.
This seems to be a bug, please advise, as I would like to use this feature.