Is there a way to get a clock table to show items
that do not have a clock entry?

Here's the use-case:

I'm working on Task 1, and encounter an unusual problem.
I want my clock report to show some detail about why Task 1
took more time than usual.

I don't want to create a sub-heading and clock into it, and
adjust the clock, etc.  I just want to store a note about this, and
have the note appear in the clock report.

Example:

----------------------
* Task 1

 :LOGBOOK:
  CLOCK: [2010-03-01 Mon 10:35]--[2010-03-01 Mon 11:40] =>  1:05
  :END:

** Encountered unusual problem
[2010-03-01 Mon 10:45]
---------------------

I'd like the clock report to look like this:

Clock summary at [2010-03-03 Wed 14:15]

| L | Headline     | Time   |
|---+--------------+--------|
|   | *Total time* | *1:05* |
|---+--------------+--------|
| 1 | Task 1       | 1:05   |
|    | Encountered unusual problem | |

Is this possible by using the clocktable function, or should I try writing a
dynamic block myself?

Thanks,
--Nate