Found the following validation problem for the NEWS.Rd HTML conversion:
NEWS.html:1173:1 (inst/NEWS.Rd:590): Warning: missing </ul> before </div>
NEWS.html:51:1 (inst/NEWS.Rd:24): Warning: <h4> anchor "OTHER-UPDATES" already defined
NEWS.html:77:1 (inst/NEWS.Rd:39): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:108:1 (inst/NEWS.Rd:54): Warning: <h4> anchor "OTHER-UPDATES" already defined
NEWS.html:119:1 (inst/NEWS.Rd:60): Warning: <h4> anchor "ACKNOWLEDGEMENTS" already defined
NEWS.html:140:1 (inst/NEWS.Rd:71): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:151:1 (inst/NEWS.Rd:77): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:165:1 (inst/NEWS.Rd:84): Warning: <h4> anchor "OTHER-UPDATES" already defined
NEWS.html:179:1 (inst/NEWS.Rd:91): Warning: <h4> anchor "ACKNOWLEDGEMENTS" already defined
NEWS.html:200:1 (inst/NEWS.Rd:102): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:211:1 (inst/NEWS.Rd:108): Warning: <h4> anchor "ACKNOWLEDGEMENTS" already defined
NEWS.html:226:1 (inst/NEWS.Rd:118): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:237:1 (inst/NEWS.Rd:124): Warning: <h4> anchor "ACKNOWLEDGEMENTS" already defined
NEWS.html:252:1 (inst/NEWS.Rd:134): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:263:1 (inst/NEWS.Rd:140): Warning: <h4> anchor "OTHER-UPDATES" already defined
NEWS.html:274:1 (inst/NEWS.Rd:146): Warning: <h4> anchor "ACKNOWLEDGEMENTS" already defined
NEWS.html:292:1 (inst/NEWS.Rd:158): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:306:1 (inst/NEWS.Rd:165): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:320:1 (inst/NEWS.Rd:172): Warning: <h4> anchor "OTHER-UPDATES" already defined
NEWS.html:334:1 (inst/NEWS.Rd:179): Warning: <h4> anchor "ACKNOWLEDGEMENTS" already defined
NEWS.html:358:1 (inst/NEWS.Rd:193): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:381:1 (inst/NEWS.Rd:203): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:409:1 (inst/NEWS.Rd:217): Warning: <h4> anchor "OTHER-UPDATES" already defined
NEWS.html:429:1 (inst/NEWS.Rd:226): Warning: <h4> anchor "ACKNOWLEDGEMENTS" already defined
NEWS.html:450:1 (inst/NEWS.Rd:239): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:470:1 (inst/NEWS.Rd:248): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:499:1 (inst/NEWS.Rd:260): Warning: <h4> anchor "OTHER-UPDATES" already defined
NEWS.html:516:1 (inst/NEWS.Rd:268): Warning: <h4> anchor "ACKNOWLEDGEMENTS" already defined
NEWS.html:537:1 (inst/NEWS.Rd:281): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:551:1 (inst/NEWS.Rd:288): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:583:1 (inst/NEWS.Rd:301): Warning: <h4> anchor "ACKNOWLEDGEMENTS" already defined
NEWS.html:601:1 (inst/NEWS.Rd:313): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:618:1 (inst/NEWS.Rd:321): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:629:1 (inst/NEWS.Rd:327): Warning: <h4> anchor "OTHER-UPDATES" already defined
NEWS.html:647:1 (inst/NEWS.Rd:339): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:658:1 (inst/NEWS.Rd:345): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:669:1 (inst/NEWS.Rd:351): Warning: <h4> anchor "DEPRECATED-AND-DEFUNCT" already defined
NEWS.html:680:1 (inst/NEWS.Rd:357): Warning: <h4> anchor "OTHER-UPDATES" already defined
NEWS.html:701:1 (inst/NEWS.Rd:369): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:724:1 (inst/NEWS.Rd:379): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:762:1 (inst/NEWS.Rd:394): Warning: <h4> anchor "DEPRECATED-AND-DEFUNCT" already defined
NEWS.html:773:1 (inst/NEWS.Rd:400): Warning: <h4> anchor "OTHER-UPDATES" already defined
NEWS.html:793:1 (inst/NEWS.Rd:409): Warning: <h4> anchor "ACKNOWLEDGEMENTS" already defined
NEWS.html:808:1 (inst/NEWS.Rd:420): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:831:1 (inst/NEWS.Rd:430): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:845:1 (inst/NEWS.Rd:437): Warning: <h4> anchor "DEPRECATED-AND-DEFUNCT" already defined
NEWS.html:856:1 (inst/NEWS.Rd:443): Warning: <h4> anchor "OTHER-UPDATES" already defined
NEWS.html:873:1 (inst/NEWS.Rd:451): Warning: <h4> anchor "ACKNOWLEDGEMENTS" already defined
NEWS.html:891:1 (inst/NEWS.Rd:461): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:917:1 (inst/NEWS.Rd:472): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:946:1 (inst/NEWS.Rd:484): Warning: <h4> anchor "DEPRECATED-AND-DEFUNCT" already defined
NEWS.html:957:1 (inst/NEWS.Rd:490): Warning: <h4> anchor "OTHER-UPDATES" already defined
NEWS.html:977:1 (inst/NEWS.Rd:499): Warning: <h4> anchor "ACKNOWLEDGEMENTS" already defined
NEWS.html:995:1 (inst/NEWS.Rd:508): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:1009:1 (inst/NEWS.Rd:515): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:1038:1 (inst/NEWS.Rd:527): Warning: <h4> anchor "OTHER-UPDATES" already defined
NEWS.html:1058:1 (inst/NEWS.Rd:536): Warning: <h4> anchor "ACKNOWLEDGEMENTS" already defined
NEWS.html:1073:1 (inst/NEWS.Rd:544): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:1099:1 (inst/NEWS.Rd:555): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:1119:1 (inst/NEWS.Rd:564): Warning: <h4> anchor "OTHER-UPDATES" already defined
NEWS.html:1137:1 (inst/NEWS.Rd:574): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:1148:1 (inst/NEWS.Rd:580): Warning: <h4> anchor "DEPRECATED-AND-DEFUNCT" already defined
NEWS.html:1159:1 (inst/NEWS.Rd:586): Warning: <h4> anchor "BUG-FIXES" already defined