Invalid xhtml from field_table.inc

Line 86 of contrib/field_table.inc reads,

  $output = "<table id=$fieldname>";

Without quotes around the id, it's invalid xhtml.

In any case, where muliple instances of the same flexinode type appear within the same page, they would all have the same id; this is also invalid xhtml. Suggest either dropping the id attribute or making it always unique...