on Next, the button and tab graphics are not appearing in a Trans page

Per Joshua, this sounds like a skin problem.

From IE 7 for XP, I went to the Trans here:

http://next.dev.curriki.org/xwiki/bin/edit/XWiki/CurrikiGWTTranslation?editor=wiki

There are no buttons or tabs appearing on the page around the wiki editing window.

When I roll my cursor over the button area, it becomes hot and I can see it's targeting the URL "/xwiki/bin/preview/XWiki/CurrikiGWTTranslation" but I can't see the buttons themselves.

For the tabs, there is a light background color coming up behind the highlighted tab on rollover and it's targeting the WYSIWYG tab view of theTrans, but otherwise they're invisible.

See screenshot.