LinkSubmit does not seem to check to see if that the Form that it's embedded in uses a DOM id and therefore always refers to the from by its automatically generated name attribute, even though it should be referring to it by the user-defined DOM id instead. Not all (any?) DOM environments will allow you to refer to an element by its name attribute when it also has an id assigned.
This should be fairly trivial to fix. I'd be more than happy to make the fix myself if you decide this issue should be resolved.