Found the following validation problem for the NEWS.Rd HTML conversion:
NEWS.html:793:1 (inst/NEWS.Rd:410): Warning: missing </ul> before </div>
NEWS.html:56:1 (inst/NEWS.Rd:20): Warning: <h4> anchor "OTHER-CHANGES" already defined
NEWS.html:90:1 (inst/NEWS.Rd:38): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:108:1 (inst/NEWS.Rd:48): Warning: <h4> anchor "OTHER-CHANGES" already defined
NEWS.html:124:1 (inst/NEWS.Rd:56): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:144:1 (inst/NEWS.Rd:68): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:157:1 (inst/NEWS.Rd:75): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:173:1 (inst/NEWS.Rd:83): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:187:1 (inst/NEWS.Rd:91): Warning: <h4> anchor "OTHER-CHANGES" already defined
NEWS.html:219:1 (inst/NEWS.Rd:107): Warning: <h4> anchor "BUG-FIX" already defined
NEWS.html:235:1 (inst/NEWS.Rd:115): Warning: <h4> anchor "OTHER-CHANGES" already defined
NEWS.html:272:1 (inst/NEWS.Rd:134): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:294:1 (inst/NEWS.Rd:146): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:311:1 (inst/NEWS.Rd:155): Warning: <h4> anchor "BUGFIX" already defined
NEWS.html:323:1 (inst/NEWS.Rd:161): Warning: <h4> anchor "OTHER-CHANGES" already defined
NEWS.html:352:1 (inst/NEWS.Rd:176): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:383:1 (inst/NEWS.Rd:193): Warning: <h4> anchor "OTHER-CHANGES" already defined
NEWS.html:408:1 (inst/NEWS.Rd:206): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:421:1 (inst/NEWS.Rd:213): Warning: <h4> anchor "BUGFIX" already defined
NEWS.html:440:1 (inst/NEWS.Rd:224): Warning: <h4> anchor "OTHER-CHANGES" already defined
NEWS.html:460:1 (inst/NEWS.Rd:236): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:475:1 (inst/NEWS.Rd:243): Warning: <h4> anchor "BUGFIX" already defined
NEWS.html:490:1 (inst/NEWS.Rd:250): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:513:1 (inst/NEWS.Rd:263): Warning: <h4> anchor "OTHER-CHANGES" already defined
NEWS.html:531:1 (inst/NEWS.Rd:273): Warning: <h4> anchor "OTHER-CHANGES" already defined
NEWS.html:549:1 (inst/NEWS.Rd:281): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:561:1 (inst/NEWS.Rd:287): Warning: <h4> anchor "OTHER-CHANGES" already defined
NEWS.html:594:1 (inst/NEWS.Rd:305): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:607:1 (inst/NEWS.Rd:312): Warning: <h4> anchor "OTHER-CHANGES" already defined
NEWS.html:622:1 (inst/NEWS.Rd:319): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:640:1 (inst/NEWS.Rd:329): Warning: <h4> anchor "BUGFIXES" already defined
NEWS.html:657:1 (inst/NEWS.Rd:340): Warning: <h4> anchor "OTHER-CHANGES" already defined
NEWS.html:674:1 (inst/NEWS.Rd:349): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:706:1 (inst/NEWS.Rd:367): Warning: <h4> anchor "BUGFIXES" already defined
NEWS.html:727:1 (inst/NEWS.Rd:378): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:741:1 (inst/NEWS.Rd:386): Warning: <h4> anchor "BUGFIXES" already defined
NEWS.html:756:1 (inst/NEWS.Rd:393): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:772:1 (inst/NEWS.Rd:401): Warning: <h4> anchor "BUGFIXES" already defined