Even though I'd seen some warnings about making changes to margains when using fluid layouts, I was trying to center an image in a div and changed the margain. Suddenly, the 'desktop' layout for the page wouldn't display correctly in the Design tab. I thought I'd hosed the entire page, but I tried viewing it in Firefox - and it works perfectly.
In the Design view, when showing the 'desktop' view, it only shows the header and first div as being within the fluid grid. I figured that meant I'd entered some errant character either in the CSS about that point or the source code. No joy in either location.
Also, I can visually edit the sizes of the divs (which all show as fluid in 'tablet' and 'mobile' sizes) in the two smaller sizes, but not in the 'desktop' view. Even the two divs that show as fluid cannot be resized in the desktop view - though they are selectable and show the sizing handles.
Is the feature so new that it's this buggy? Or am I missing something else?
Also - how much should boilerplate.css change? Should mods be made to this file?
I'm NOT an expert in DW, CSS or HTML, so I'd be perfectly willing to accept I've done something wrong.