Upgrading from 1.0.1 to 1.1.1

Upgrading from 1.0.1 to 1.1.1

I've just downloaded version 1.1.1 and I changed my site (which is still otherwise under development) to use the new .js and .css files.

It's not good. 

1.  ui-grid-a lists now wrap - all the panels are listed on the left, but only taking half the screen width. 
Note: this seems to be fixable by changing the style:
.ui-grid-a .ui-btn, .ui-grid-b .ui-btn, .ui-grid-c .ui-btn, .ui-grid-d .ui-btn, .ui-grid-e .ui-btn, .ui-grid-solo .ui-btn { margin-right: 5px; margin-left: 5px; }

from 
margin-right: 5px; margin-left: 5px; 
to 
margin-right: 0; margin-left: 0;

But I don't want to do this as there may be knock on effects elsewhere

2.  The page header, which was always visible at the top of the window now sometimes disappears, and I can only get it back by scrolling to the top of the page.

3.  The top of the page, which did sit below the page header is now covered by the page header (until it decides to disappear)

These are the only issues I've noticed so far, but there may be more.

Is there a process I have to go through to upgrade my site from 1.0.1 to 1.1.1 - apart from just changing the CSS and JS files?

These issues where seen in Firefox n a Windows PC and in Dolphin on an Android phone