Found the following validation problem for the NEWS.Rd HTML conversion:
NEWS.html:906:1 (inst/NEWS.Rd:649): Warning: missing </ul> before </div>
NEWS.html:58:1 (inst/NEWS.Rd:33): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:76:1 (inst/NEWS.Rd:47): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:93:1 (inst/NEWS.Rd:60): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:109:1 (inst/NEWS.Rd:72): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:128:1 (inst/NEWS.Rd:86): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:142:1 (inst/NEWS.Rd:96): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:159:1 (inst/NEWS.Rd:108): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:181:1 (inst/NEWS.Rd:124): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:217:1 (inst/NEWS.Rd:151): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:241:1 (inst/NEWS.Rd:169): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:255:1 (inst/NEWS.Rd:179): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:276:1 (inst/NEWS.Rd:195): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:287:1 (inst/NEWS.Rd:202): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:315:1 (inst/NEWS.Rd:223): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:331:1 (inst/NEWS.Rd:235): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:344:1 (inst/NEWS.Rd:244): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:360:1 (inst/NEWS.Rd:256): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:371:1 (inst/NEWS.Rd:263): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:398:1 (inst/NEWS.Rd:283): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:431:1 (inst/NEWS.Rd:307): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:451:1 (inst/NEWS.Rd:322): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:469:1 (inst/NEWS.Rd:335): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:486:1 (inst/NEWS.Rd:348): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:498:1 (inst/NEWS.Rd:356): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:514:1 (inst/NEWS.Rd:368): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:534:1 (inst/NEWS.Rd:383): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:558:1 (inst/NEWS.Rd:400): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:574:1 (inst/NEWS.Rd:412): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:593:1 (inst/NEWS.Rd:426): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:605:1 (inst/NEWS.Rd:434): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:622:1 (inst/NEWS.Rd:447): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:638:1 (inst/NEWS.Rd:459): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:650:1 (inst/NEWS.Rd:467): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:676:1 (inst/NEWS.Rd:487): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:691:1 (inst/NEWS.Rd:497): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:709:1 (inst/NEWS.Rd:509): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:729:1 (inst/NEWS.Rd:524): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:766:1 (inst/NEWS.Rd:552): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:785:1 (inst/NEWS.Rd:566): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:800:1 (inst/NEWS.Rd:576): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:815:1 (inst/NEWS.Rd:587): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:845:1 (inst/NEWS.Rd:608): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:861:1 (inst/NEWS.Rd:620): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:891:1 (inst/NEWS.Rd:641): Warning: <h4> anchor "BUG-FIXES" already defined