It appears the WebGrid has a rendering issue where its rendering a second double quote when outputting the grid-groupboxlabel element.

I can reproduce this in http://www.intersoftsolutions.com/WebGrid/#live, First Experience also

WebGrid 10.0.7200.24

I have screenshots I shared with Yudi in email, but are difficult to paste into here.

Reproduction Steps:

1. Open IE 11.0.9600.18378
2. Open IE Developer Toolbar
3. Load http://www.intersoftsolutions.com/WebGrid/#live, First Experience
4. Use the ‘Select Element’ option to select the group by box.
5. Look at the output of the TD element – it is really rendering as class=”grid-groupboxlabel”” (2 double quotes).
1. IE has tried to fix the rendering it as:  <td title="" class="grid-groupboxlabel" id="tdGBBInfo_ctl00_content_WebGrid1" "="">Drag a column header here to group by that column.</td>
2. The original source was <td id="tdGBBInfo_ctl00_content_WebGrid1" class="grid-groupboxlabel"">Drag a column header here to group by that column.</td>

Looking from Fiddler at the output of FirstExperience.aspx, you can see the invalid HTML output.

In our application however, IE is a little more aggressive with throwing an error instead of just fixing the DOM, as highlighted in yellow in the screenshot below.

HTML1423: Malformed start tag. Attributes should be separated by whitespace.

File: pdqdisplay.aspx, Line: 164, Column: 9798

HTML1409: Invalid attribute name character. Attribute names should not contain ("),('),(<), or (=).

File: pdqdisplay.aspx, Line: 164, Column: 9798