BUG #2056: to_char no long takes time as input?

The following bug has been logged online:

Bug reference: 2056
Logged by: Nick Addington
Email address: adding(at)math(dot)wisc(dot)edu
PostgreSQL version: 8.1.0
Operating system: aix
Description: to_char no long takes time as input?
Details:

The following code works in 8.0.4 but fails in 8.1.0:

select to_char('1:00 pm'::time,'HH:MM AM');

8.1.0 gives this is the error message:
ERROR: invalid format specification for an interval value
HINT: Intervals are not tied to specific calendar dates.

I saw some discussion on the -hackers list about deprecating
to_char(interval, text), but do you really want to chuck to_char(time,
text)? That's a useful function. Or at least, I was using it...

Please advise,
Nick Addington