id,summary,reporter,owner,description,type,status,priority,milestone,component,version,severity,resolution,keywords,cc
13153,Bulk Edit overrites non hierarchical taxonomies,prettyboymp,nacin,"When bulk editing posts, leaving the post_tags field blank causes all the tags to be deleted for the updated posts.  Bulk editing taxonomies should only be additive like it is with hierarchical taxonomies.

To reproduce: 
1.  Set tags for a post
2.  Bulk edit that post, but don't make any changes.
3.  Hit Update.
The tags have been removed from the post.",defect (bug),closed,high,3.0,Taxonomy,,blocker,fixed,"has-patch, tested, commit",mpretty@…