Add a Known bugs section

README.md

@@ -101,3 +101,11 @@ default `.chimera/resources` is
     html.defaultFont: -*-*-*-*-*-*-*-*-*-*-*-*-*-*
     chimera.homeURL: http://example.org
     bookmark.filename: ~/.chimera/bookmarks.html
+
+Known bugs
+----------
+
+- The browser will crash if a relative URL contains a ':', likely a URL
+  parsing error.
+- Saving pages will often segfault, even when loading them would work.
+- http:// links that redirect to HTTPS hang with "0 bytes read so far."