Found the following validation problem for the NEWS.Rd HTML conversion:
NEWS.html:429:1 (inst/NEWS.Rd:196): Warning: missing </ul> before </div>
NEWS.html:43:1 (inst/NEWS.Rd:16): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:75:1 (inst/NEWS.Rd:30): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:93:1 (inst/NEWS.Rd:38): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:113:1 (inst/NEWS.Rd:48): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:124:1 (inst/NEWS.Rd:53): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:139:1 (inst/NEWS.Rd:60): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:154:1 (inst/NEWS.Rd:67): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:165:1 (inst/NEWS.Rd:72): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:186:1 (inst/NEWS.Rd:81): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:197:1 (inst/NEWS.Rd:86): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:212:1 (inst/NEWS.Rd:93): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:224:1 (inst/NEWS.Rd:99): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:242:1 (inst/NEWS.Rd:107): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:257:1 (inst/NEWS.Rd:114): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:276:1 (inst/NEWS.Rd:125): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:293:1 (inst/NEWS.Rd:132): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:308:1 (inst/NEWS.Rd:139): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:333:1 (inst/NEWS.Rd:150): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:354:1 (inst/NEWS.Rd:161): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:372:1 (inst/NEWS.Rd:169): Warning: <h4> anchor "NEW-FEATURES" already defined
NEWS.html:386:1 (inst/NEWS.Rd:175): Warning: <h4> anchor "BUG-FIXES" already defined
NEWS.html:407:1 (inst/NEWS.Rd:186): Warning: <h4> anchor "NEW-FEATURES" already defined