html mode: columns block fails after tag block

[Krzysztof Żelechowski]

GROFF VERSION: 1.20

MACHINE: noname

OS: openSuSE 11.2

COMPILER: g++ 4.4

INPUT FILES: 

.Dd 
.Sh heading
.
.Bl -column -offset indent ".Sy String" ".Sy Nroff" ".Sy Troff"
.It Sy String Ta Sy Nroff Ta Sy Troff
.It Li <= Ta <= Ta \*(<=
.It Li >= Ta >= Ta \*(>=
.El
.Bl -tag -width ".Li .Pp"
.It Li .Pp
The 
.El
.Bl -column -offset indent ".Sy String" ".Sy Nroff" ".Sy Troff"
.It Sy String Ta Sy Nroff Ta Sy Troff
.It Li <= Ta <= Ta \*(<=
.It Li >= Ta >= Ta \*(>=
.El

COMMAND LINE: ./test-groff -s -mandoc -Thtml

DESCRIPTION OF INCORRECT BEHAVIOUR:

Expected result: 

TABLE
LIST
TABLE

Actual result: 

TABLE
LIST
3 shifted paragraphs