PhpWiki 1.2.9 fixes a bug introduced with 1.2.3 for dba and dbm:
http://sourceforge.net/project/showfiles.php?group_id=6121&package_id=14187&release_id=320950
Note that 1.2.x is the old-stable branch, which is not in active development since 2001 anymore. 1.3.x is the active branch.