Msg#: 3680653 posted 8:51 am on Jun 22, 2008 (gmt 0)
Was the line added recently? It's possible that Google discovered the content a long time ago, and has not revisited the pages since being disallowed (you can check the cache date on the files to get an idea if this is the case).
This is often true of content that has few or no external links to it (which is likely the case with your /skins/ folder). Such content can hang around for months and months since Googlebot never revisits it.
If it's important to get the files removed you can use the URL removal tool in webmaster tools, otherwise it's just a case of waiting. Certainly, there doesn't appear to be any problem with your robots directives.
Msg#: 3680653 posted 8:55 am on Jun 22, 2008 (gmt 0)
No the whole robots.txt file was created in Feb 2008 I have just started to work on it again and to see how it was doing in the serps I did a site: command and found the skins folder to be indexed and every folder within it, I thought it was strange.
edit: there's no cache date only the Similar OR note tags
Msg#: 3680653 posted 9:08 am on Jun 22, 2008 (gmt 0)
In that case they are excluded, and your robots directives are being obeyed: Google is aware of the content because of links to it, but it is 'prevented' from retrieving it and so there is no cache or snippet.
Excluded files can hang around in this way for a long time (forever?) and while they make a mess of site: search results, in my experience there isn't usually any impact on performance.