This bug was derived from comments in Bug 133273. The targetmilestoneurl should be filtered using 'FILTER uri' in template/default/show/show_bug.html.tmpl.
Target -> 2.16. Keywords: patch, review. Add CCs. Assign to me.
Created attachment 76076 [details] [diff] [review] Patch v.1 Add 'FILTER uri' to bugs.milestoneurl output.
I didn't realise you'd filed this one; I fixed in in passing just now. Gerv