Description of problem:
When you define a column width in a table using fractions of an inch, Publican ignores the colwidth parameter at transform time and uses a colwidth of 100% instead. The table then does not render properly.

So something like:

<table id="tab.foo"><title>Foo</title>
<tgroup cols="3">
<colspec colnum="1" colname="col1" colwidth="2in" />
<colspec colnum="2" colname="col2" colwidth="1.25in" />
<colspec colnum="3" colname="col3" colwidth="3in" />

is transformed into:

<table summary="Foo"><colgroup><col class="col1" width="2in"><col class="col2" width="100%"><col class="col3" width="3in"></colgroup>

Version-Release number of selected component (if applicable):
3.1

How reproducible:
100%

Steps to Reproduce:
1. Create a table with colwidths defined in fractions of an inch
2. Build in HTML
  
Actual results:
Fractional colwidth replaced by "100%", table badly distorted.

Expected results:
Fractional colwidth used as provided; table rendered appropriately

Additional info:
Workaround is simply to use the proportional "*" notation supported in DocBook, so 2in/1.25in/3in becomes 8*/5*/12*.