Clamp on span interferes with contenteditable on text clear

[thebirdman7]

When using clamp on a span within Chrome (and possibly other browsers) and using the "contenteditable" attribute on the span to allow inline editing, after clearing the text, the area then becomes uneditable. It still shows the editable border and everything, but no characters you type ever appear in the field. When I stop using clamp, normal functioning returns.

This seems to bring two problems to light. One is that I have not been able to find a way to easily suspend the use of clamp on a field. The second is the bug.. Editing does still appear to function, until you remove the last character from the field.