I’ve got a similar issue with ExpressCurate fubar’ing Shortcode Ultimate on multiple sites. EC is incorrectly parsing tag links on the content, then when WordPress generates the HTML, it doesn’t work.
Original shortcode:
[su_button url="#" style="3d" background="d03135" size="13" center="no" radius="5" icon="icon: check"]Button text[/su_button]
… Gets altered to this upon save only when EC is active:
[su_button url="#" style="3d" background="<a class="expresscurate_contentTags" href="#">#d03135</a>" size="13" center="no" radius="5" icon="icon: check"]<strong>Button text</strong>[/su_button]
