User Warning

When I click on the Image Taxonomy Page I get this error. Can someone help me?

user warning: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '=<default> and i.nid=t.nid and i.fid=f.fid and i.image_size='thumbnail'' at line 1 query: SELECT f.filepath,i.nid FROM main_files f,main_term_node t,main_image i WHERE t.tid=<default> and i.nid=t.nid and i.fid=f.fid and i.image_size='thumbnail' in /home/domain/public_html/subdomain/sites/all/modules/imgupload/imgupload/imgupload/imgtax.module on line 672.
user warning: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '=<default> and i.nid=t.nid and i.fid=f.fid and i.image_size='thumbnail'' at line 1 query: SELECT f.filepath,i.nid FROM main_files f,main_term_node t,main_image i WHERE t.tid=<default> and i.nid=t.nid and i.fid=f.fid and i.image_size='thumbnail' in /home/domain/public_html/subdomain/sites/all/modules/imgupload/imgupload/imgupload/imgtax.module on line 672.