Found the following HTML validation problems:
Buffer.html:823:1 (Buffer.Rd:465): Warning: missing </ul> before </div>
Buffer.html:141:1 (Buffer.Rd:59): Warning: <h5> anchor "Usage" already defined
Buffer.html:147:1 (Buffer.Rd:63): Warning: <h5> anchor "Arguments" already defined
Buffer.html:172:1 (Buffer.Rd:78): Warning: <h5> anchor "Usage" already defined
Buffer.html:178:1 (Buffer.Rd:82): Warning: <h5> anchor "Arguments" already defined
Buffer.html:203:1 (Buffer.Rd:97): Warning: <h5> anchor "Usage" already defined
Buffer.html:209:1 (Buffer.Rd:101): Warning: <h5> anchor "Arguments" already defined
Buffer.html:242:1 (Buffer.Rd:120): Warning: <h5> anchor "Usage" already defined
Buffer.html:248:1 (Buffer.Rd:124): Warning: <h5> anchor "Arguments" already defined
Buffer.html:273:1 (Buffer.Rd:139): Warning: <h5> anchor "Usage" already defined
Buffer.html:279:1 (Buffer.Rd:143): Warning: <h5> anchor "Arguments" already defined
Buffer.html:292:1 (Buffer.Rd:150): Warning: <h5> anchor "Returns" already defined
Buffer.html:309:1 (Buffer.Rd:159): Warning: <h5> anchor "Usage" already defined
Buffer.html:315:1 (Buffer.Rd:163): Warning: <h5> anchor "Arguments" already defined
Buffer.html:334:1 (Buffer.Rd:176): Warning: <h5> anchor "Returns" already defined
Buffer.html:354:1 (Buffer.Rd:188): Warning: <h5> anchor "Usage" already defined
Buffer.html:360:1 (Buffer.Rd:192): Warning: <h5> anchor "Arguments" already defined
Buffer.html:386:1 (Buffer.Rd:208): Warning: <h5> anchor "Usage" already defined
Buffer.html:402:1 (Buffer.Rd:218): Warning: <h5> anchor "Usage" already defined
Buffer.html:408:1 (Buffer.Rd:222): Warning: <h5> anchor "Arguments" already defined
Buffer.html:421:1 (Buffer.Rd:229): Warning: <h5> anchor "Returns" already defined
Buffer.html:439:1 (Buffer.Rd:239): Warning: <h5> anchor "Usage" already defined
Buffer.html:445:1 (Buffer.Rd:243): Warning: <h5> anchor "Arguments" already defined
Buffer.html:466:1 (Buffer.Rd:258): Warning: <h5> anchor "Returns" already defined
Buffer.html:483:1 (Buffer.Rd:267): Warning: <h5> anchor "Usage" already defined
Buffer.html:489:1 (Buffer.Rd:271): Warning: <h5> anchor "Arguments" already defined
Buffer.html:502:1 (Buffer.Rd:278): Warning: <h5> anchor "Returns" already defined
Buffer.html:519:1 (Buffer.Rd:287): Warning: <h5> anchor "Usage" already defined
Buffer.html:525:1 (Buffer.Rd:291): Warning: <h5> anchor "Arguments" already defined
Buffer.html:550:1 (Buffer.Rd:306): Warning: <h5> anchor "Usage" already defined
Buffer.html:556:1 (Buffer.Rd:310): Warning: <h5> anchor "Arguments" already defined
Buffer.html:569:1 (Buffer.Rd:317): Warning: <h5> anchor "Returns" already defined
Buffer.html:587:1 (Buffer.Rd:327): Warning: <h5> anchor "Usage" already defined
Buffer.html:593:1 (Buffer.Rd:331): Warning: <h5> anchor "Arguments" already defined
Buffer.html:618:1 (Buffer.Rd:346): Warning: <h5> anchor "Usage" already defined
Buffer.html:624:1 (Buffer.Rd:350): Warning: <h5> anchor "Arguments" already defined
Buffer.html:637:1 (Buffer.Rd:357): Warning: <h5> anchor "Returns" already defined
Buffer.html:655:1 (Buffer.Rd:367): Warning: <h5> anchor "Usage" already defined
Buffer.html:661:1 (Buffer.Rd:371): Warning: <h5> anchor "Arguments" already defined
Buffer.html:674:1 (Buffer.Rd:378): Warning: <h5> anchor "Returns" already defined
Buffer.html:692:1 (Buffer.Rd:388): Warning: <h5> anchor "Usage" already defined
Buffer.html:703:1 (Buffer.Rd:397): Warning: <h5> anchor "Arguments" already defined
Buffer.html:724:1 (Buffer.Rd:412): Warning: <h5> anchor "Returns" already defined
Buffer.html:741:1 (Buffer.Rd:421): Warning: <h5> anchor "Usage" already defined
Buffer.html:747:1 (Buffer.Rd:425): Warning: <h5> anchor "Arguments" already defined
Buffer.html:760:1 (Buffer.Rd:432): Warning: <h5> anchor "Returns" already defined
Buffer.html:777:1 (Buffer.Rd:441): Warning: <h5> anchor "Usage" already defined
Buffer.html:783:1 (Buffer.Rd:445): Warning: <h5> anchor "Returns" already defined
Buffer.html:800:1 (Buffer.Rd:454): Warning: <h5> anchor "Usage" already defined
Buffer.html:806:1 (Buffer.Rd:458): Warning: <h5> anchor "Arguments" already defined
as.rglscene.html:60:1 (as.rglscene.Rd:22): Warning: missing </ul> before </div>
rgl.Sweave.html:108:1 (rgl.Sweave.Rd:66): Warning: <h3> anchor "_sec_note" already defined