Problem with the title
The page lists comment flags too, so the original title "Flagged Posts for $(name)" is technically incorrect. (From @Laurel's comment.)
Problem with the heading
I think at first sight the heading may be understood by first-time visitors to the page as "Flags against $(name)", that is, the list of flags other users raised against the user's questions/answers. When they go through the list, they'll know that's obviously not what the page is for.
Why not say "Flags by $(name)" as both the title and the h1 heading? It seems a minor problem, but wouldn't it be clearer for users visiting the page for the first time?