You know that often, Google Webmaster Tools shows an image preview of your site’s home page on the dashboard listing view of your site profiles within Google Webmaster Tools.
What if the image of your site is wrong? Should you be concerned? Google’s John Mueller implies it is really not something to be too concerned about.
In a Google Webmaster Help thread, one person was concerned because his mobile site was displayed in the preview and not his main site. John said, don’t “give too much weight to these preview images.”
These previews don’t represent what Googlebot crawls or your indexing and ranking. It is likely just a style thing for Webmaster Tools.
While the preview for this site looks fine:
My corporate site has a CSS slider image feature which makes the preview for that site look all weird:
Forum discussion at Google Webmaster Help.