Description of problem:
"man 8 isdnctrl_conf" is an unusual manpage; 
"gunzip -c /usr/share/man/man8/isdnctrl_conf.8.gz|less" shows the manpage to contain valid-looking troff macros, but the format looks nothing like any of the other manpages on the system: no heading, NAME, SYNOPSIS, DESCRIPTION etc.

The macros don't seem to be properly handled, and the textual content from them is not appearing when rendered by "man".

For example, unzipped the file shows this clause:

.SS Syntax of the configuration file
This syntax will be used for the options
.B readconf
and
.B writeconf.

But this is rendered by "man" as:
"This syntax will be used for the options and"

i.e. the "readconf" and "writeconf" macro args are being dropped

Version-Release number of selected component (if applicable):
isdn4k-utils-3.2-51.el5

How reproducible:
100%; minor issue

Steps to Reproduce:
1. gunzip -c /usr/share/man/man8/isdnctrl_conf.8.gz
2. man 8 isdnctrl_conf
  
Actual results:
Textual content from step 1 appears in step 2, but the macros don't appear to be doing anything useful in step 2.  Doesn't look like a regular manpage.  Much content being dropped from "man" output (see above)

Expected results:
Regular-looking manpage

Additional info:
(Found testing an automated manpage checker, testing all of manpages in RHEL 5.3)