BUGFIX: proper regex escaping

app/jobs/regular/pull_hotlinked_images.rb

@@ -48,7 +48,7 @@ module Jobs
             # have we successfully downloaded that file?
             if downloaded_urls[src].present?
               url = downloaded_urls[src]
-              escaped_src = src.gsub("?", "\\?").gsub(".", "\\.").gsub("+", "\\+")
+              escaped_src = Regexp.escape(src)
               # there are 6 ways to insert an image in a post
               # HTML tag - <img src="http://...">
               raw.gsub!(/src=["']#{escaped_src}["']/i, "src='#{url}'")