In the soon-to-be-attached test case, a right-to-left table's collapsed borders are rendered as though it were left-to-right, i.e. in a mirror-position. Somebody forgot their "if (direction == RTL) then" line... build is 2002-10-24-15.
Created attachment 104136 [details] miscollapsed borders example note the file is encoded in ucs-16 (I think).
*** This bug has been marked as a duplicate of 174470 ***