Do you edit the main CSS file for your site (keeping a pre-modification backup), or do you use the Customize plugin with the blank Style.css?
The problem I am having is, I am slowly getting used to Firebug, and it helps and is great for showing real-time changes, etc.. But when the way CSS updater works, it apparently can't work off the Pagelines-Customize plugin's blank Style.css because it is looking for the original CSS to modify (which doesn't exist in that file), and thus won't insert the new CSS into the file. (I found this out because one update I did get to sync, because I had previously added my own modification of the CSS to the blank stylesheet - so I just got lucky that it was the exact CSS path I needed)
Kind of a pain, but I didn't want to start down a dangerous road by hunting for the actual CSS file the site references and modifying it, and finding out something breaks down the road after an update etc.. But I suppose something "changing" could also be a problem even when using your own CSS? I dunno.. I'm gonna start rambling if I explore that train of thought...
I've thought about just finding that file, and copying all the CSS in it, and pasting it into the blank Style.css, so I can modify it that way. But even in this age of broadband that strikes me as - less than elegant, and like a lot of unneeded duplicate data to load.
I'd like to hear other peoples thoughts on how they approach this kind of issue, when it comes to customization, and the tools they use.