Found the following HTML validation problems:
11_d.EMControl.html:19:1 (11_d.EMControl.Rd:6): Warning: <h2> attribute "id" has invalid value "EM Control"
21_init.EM.html:19:1 (21_init.EM.Rd:6): Warning: <h2> attribute "id" has invalid value "Initialization and EM"
22_emcluster.html:19:1 (22_emcluster.Rd:7): Warning: <h2> attribute "id" has invalid value "EM Algorithm"
23_emgroup.html:19:1 (23_emgroup.Rd:4): Warning: <h2> attribute "id" has invalid value "Other Initializations"
30_assign.class.html:19:1 (30_assign.class.Rd:3): Warning: <h2> attribute "id" has invalid value "Assign Class"
31_em.ic.html:19:1 (31_em.ic.Rd:8): Warning: <h2> attribute "id" has invalid value "Information Criteria"
32_em.step.html:19:1 (32_em.step.Rd:4): Warning: <h2> attribute "id" has invalid value "Single Step"
40_lmt.html:19:1 (40_lmt.Rd:3): Warning: <h2> attribute "id" has invalid value "Likelihood Mixture Tests"
99_plotem.html:19:1 (99_plotem.Rd:4): Warning: <h2> attribute "id" has invalid value "Plot EM Results"
99_plotmd.html:19:1 (99_plotmd.Rd:3): Warning: <h2> attribute "id" has invalid value "Plot Multivariate Data"
a0_project.on.2d.html:19:1 (a0_project.on.2d.Rd:3): Warning: <h2> attribute "id" has invalid value "Projection On 2D"
a1_plotppcontour.html:19:1 (a1_plotppcontour.Rd:3): Warning: <h2> attribute "id" has invalid value "Plot Projection and Contour"
xx_Jaccard.html:19:1 (xx_Jaccard.Rd:3): Warning: <h2> attribute "id" has invalid value "Jaccard Index"
xx_RRand.html:19:1 (xx_RRand.Rd:3): Warning: <h2> attribute "id" has invalid value "Rand Index"
xx_recolor.html:19:1 (xx_recolor.Rd:5): Warning: <h2> attribute "id" has invalid value "Recolor Classification IDs"
yy_print.summary.html:19:1 (yy_print.summary.Rd:5): Warning: <h2> attribute "id" has invalid value "Print and Summary"
zx_all.post_I_information.html:19:1 (zx_all.post_I_information.Rd:11): Warning: <h2> attribute "id" has invalid value "Post I Information Functions"
zy_all.lmt.html:19:1 (zy_all.lmt.Rd:24): Warning: <h2> attribute "id" has invalid value "LMT Functions"
zz_all.internal.html:19:1 (zz_all.internal.Rd:42): Warning: <h2> attribute "id" has invalid value "All Internal Functions"