Currently it's "absolute", it should be "fixed". Note that TableTools.css is correct.
The impact of this is that when a JQueryUI-styled TableTool emits a brief info dialog (eg "Copied FOO rows to clipboard") on a page that has been scrolled, the dialog remains at the top the page (and hidden as the page has been scrolled).
The impact of this is that when a JQueryUI-styled TableTool emits a brief info dialog (eg "Copied FOO rows to clipboard") on a page that has been scrolled, the dialog remains at the top the page (and hidden as the page has been scrolled).