To reproduce this, follow these steps:
1. Create a new site that references Microsoft.Web.Helpers.
2. Add @Bing.SearchBox to one of the pages.
3. Navigate to the page in the browser of your choice.
Result: The search button image will be broken. This appears to be a recent development.
Expected: We should be using a current, valid image for the search button. It looks like Bing is currently using a sprite from the image file http://www.bing.com/fd/s/a/sw17.png
Comments: The old icons we were using have been deprecated for some time now, see http://www.bing.com/blogs/site_blogs/b/webmaster/archive/2011/04/19/bing-com-siteowner-shut-down-options-for-search-results.aspx . The right location for the icon is http://www.bing.com/siteowner/s/siteowner/Spyglass_24x24.gif as provided by http://api.bing.com/Brandassets.js, which is where the assets that bing provides are listed. (see http://download.microsoft.com/download/0/4/E/04E076D4-60B2-4D31-BCC7-C4805B558DBB/Bing%20product%20guidelines.pdf) The background-image for the searchbox is gone and there is no replacement for it, so it will be removed.
1. Create a new site that references Microsoft.Web.Helpers.
2. Add @Bing.SearchBox to one of the pages.
3. Navigate to the page in the browser of your choice.
Result: The search button image will be broken. This appears to be a recent development.
Expected: We should be using a current, valid image for the search button. It looks like Bing is currently using a sprite from the image file http://www.bing.com/fd/s/a/sw17.png
Comments: The old icons we were using have been deprecated for some time now, see http://www.bing.com/blogs/site_blogs/b/webmaster/archive/2011/04/19/bing-com-siteowner-shut-down-options-for-search-results.aspx . The right location for the icon is http://www.bing.com/siteowner/s/siteowner/Spyglass_24x24.gif as provided by http://api.bing.com/Brandassets.js, which is where the assets that bing provides are listed. (see http://download.microsoft.com/download/0/4/E/04E076D4-60B2-4D31-BCC7-C4805B558DBB/Bing%20product%20guidelines.pdf) The background-image for the searchbox is gone and there is no replacement for it, so it will be removed.