Found the following validation problem for the NEWS.Rd HTML conversion:
NEWS.html:70:1 (inst/NEWS.Rd:33): Warning: <h4> anchor "Changed" already defined
NEWS.html:97:1 (inst/NEWS.Rd:45): Warning: <h4> anchor "Changed" already defined
NEWS.html:124:1 (inst/NEWS.Rd:59): Warning: <h4> anchor "Changed" already defined
NEWS.html:176:1 (inst/NEWS.Rd:88): Warning: <h4> anchor "Added" already defined
NEWS.html:199:1 (inst/NEWS.Rd:99): Warning: <h4> anchor "Changed" already defined
NEWS.html:221:1 (inst/NEWS.Rd:110): Warning: <h4> anchor "Changed" already defined
NEWS.html:236:1 (inst/NEWS.Rd:118): Warning: <h4> anchor "Changed" already defined
NEWS.html:288:1 (inst/NEWS.Rd:141): Warning: <h4> anchor "Changed" already defined
NEWS.html:304:1 (inst/NEWS.Rd:150): Warning: <h4> anchor "Changed" already defined
NEWS.html:319:1 (inst/NEWS.Rd:157): Warning: <h4> anchor "Fixed" already defined
NEWS.html:334:1 (inst/NEWS.Rd:165): Warning: <h4> anchor "Removed" already defined
NEWS.html:349:1 (inst/NEWS.Rd:172): Warning: <h4> anchor "Changed" already defined
NEWS.html:372:1 (inst/NEWS.Rd:184): Warning: <h4> anchor "Changed" already defined
NEWS.html:434:1 (inst/NEWS.Rd:216): Warning: <h4> anchor "Fixed" already defined
NEWS.html:452:1 (inst/NEWS.Rd:225): Warning: <h4> anchor "Changed" already defined
NEWS.html:466:1 (inst/NEWS.Rd:231): Warning: <h4> anchor "Added" already defined
NEWS.html:484:1 (inst/NEWS.Rd:240): Warning: <h4> anchor "Added" already defined
NEWS.html:508:1 (inst/NEWS.Rd:250): Warning: <h4> anchor "Changed" already defined
NEWS.html:522:1 (inst/NEWS.Rd:256): Warning: <h4> anchor "Removed" already defined
NEWS.html:537:1 (inst/NEWS.Rd:264): Warning: <h4> anchor "Changed" already defined
NEWS.html:555:1 (inst/NEWS.Rd:273): Warning: <h4> anchor "Changed" already defined
NEWS.html:571:1 (inst/NEWS.Rd:282): Warning: <h4> anchor "Changed" already defined
NEWS.html:596:1 (inst/NEWS.Rd:293): Warning: <h4> anchor "Removed" already defined
NEWS.html:617:1 (inst/NEWS.Rd:303): Warning: <h4> anchor "Added" already defined
NEWS.html:647:1 (inst/NEWS.Rd:318): Warning: <h4> anchor "Added" already defined
NEWS.html:675:1 (inst/NEWS.Rd:333): Warning: <h4> anchor "Fixed" already defined
NEWS.html:691:1 (inst/NEWS.Rd:342): Warning: <h4> anchor "Fixed" already defined
NEWS.html:706:1 (inst/NEWS.Rd:351): Warning: <h4> anchor "Changed" already defined
NEWS.html:720:1 (inst/NEWS.Rd:359): Warning: <h4> anchor "Added" already defined
NEWS.html:734:1 (inst/NEWS.Rd:365): Warning: <h4> anchor "Removed" already defined
NEWS.html:750:1 (inst/NEWS.Rd:374): Warning: <h4> anchor "Changed" already defined
NEWS.html:768:1 (inst/NEWS.Rd:385): Warning: <h4> anchor "Changed" already defined
NEWS.html:804:1 (inst/NEWS.Rd:405): Warning: <h4> anchor "Fixed" already defined
NEWS.html:816:1 (inst/NEWS.Rd:411): Warning: <h4> anchor "Removed" already defined
NEWS.html:835:1 (inst/NEWS.Rd:422): Warning: <h4> anchor "Added" already defined
NEWS.html:850:1 (inst/NEWS.Rd:430): Warning: <h4> anchor "Changed" already defined
NEWS.html:874:1 (inst/NEWS.Rd:444): Warning: <h4> anchor "Fixed" already defined
NEWS.html:920:1 (inst/NEWS.Rd:471): Warning: <h4> anchor "Changed" already defined
NEWS.html:937:1 (inst/NEWS.Rd:482): Warning: <h4> anchor "Added" already defined
NEWS.html:969:1 (inst/NEWS.Rd:499): Warning: <h4> anchor "Changed" already defined
NEWS.html:986:1 (inst/NEWS.Rd:509): Warning: <h4> anchor "Deprecated" already defined
NEWS.html:1003:1 (inst/NEWS.Rd:520): Warning: <h4> anchor "Changed" already defined
NEWS.html:1019:1 (inst/NEWS.Rd:528): Warning: <h4> anchor "Fixed" already defined
NEWS.html:1035:1 (inst/NEWS.Rd:537): Warning: <h4> anchor "Fixed" already defined
NEWS.html:1057:1 (inst/NEWS.Rd:548): Warning: <h4> anchor "Fixed" already defined
NEWS.html:1072:1 (inst/NEWS.Rd:556): Warning: <h4> anchor "Fixed" already defined
NEWS.html:1093:1 (inst/NEWS.Rd:568): Warning: <h4> anchor "Added" already defined
NEWS.html:1111:1 (inst/NEWS.Rd:576): Warning: <h4> anchor "Fixed" already defined
NEWS.html:1127:1 (inst/NEWS.Rd:585): Warning: <h4> anchor "Fixed" already defined
NEWS.html:1146:1 (inst/NEWS.Rd:595): Warning: <h4> anchor "Added" already defined
NEWS.html:1166:1 (inst/NEWS.Rd:606): Warning: <h4> anchor "Changed" already defined
NEWS.html:1182:1 (inst/NEWS.Rd:615): Warning: <h4> anchor "Changed" already defined
NEWS.html:1199:1 (inst/NEWS.Rd:625): Warning: <h4> anchor "Changed" already defined
NEWS.html:1222:1 (inst/NEWS.Rd:637): Warning: <h4> anchor "Changed" already defined
NEWS.html:1240:1 (inst/NEWS.Rd:646): Warning: <h4> anchor "Added" already defined
NEWS.html:1257:1 (inst/NEWS.Rd:656): Warning: <h4> anchor "Added" already defined
NEWS.html:1271:1 (inst/NEWS.Rd:662): Warning: <h4> anchor "Fixed" already defined