Thread:Project:Support desk/galleries now display as bulleted lists

We just upgraded from (I think) 1.4 to 1.18.1 (FYI: PHP 	5.2.17 (cgi) MySQL 	5.0.92-50-log )

Images within tags now display as bulleted lists instead of galleries. Can't find anything in bugs, in release notes, in documentation about the gallery tag, etc.

Example page: http://www.bayteam.org/wiki/Gallery_of_dog_photos_by_breed

Can anyone direct me to info on what caused this to break & how to fix it? Thanks.