What steps will reproduce the problem?
1. I set up Healbot with the buffs I wanted, buffed myself

What is the expected output? What do you see instead?

What version of the product are you using?

v1.3.2

Do you have an error log of what happened?

Message: Interface\AddOns\CowTip\Appearance\Appearance.lua:431 ERROR: <unnamed>TextLeft6:SetFont(): invalid fontHeight: -1.#QNAN, height must be > 0
Time: 08/26/09 01:19:57
Count: 1
Stack: [string "Interface\FrameXML\BasicControls.xml:<Scrip..."]:18: in function <[string "Interface\FrameXML\BasicControls.xml:<Scrip..."]:4>
(tail call): ?
(tail call): ?
[C]: ?
[C]: in function `SetFont'
Interface\AddOns\CowTip\Appearance\Appearance.lua:431 in function `SetFont'
Interface\AddOns\CowTip\Appearance\Appearance.lua:304 in function <Interface\AddOns\CowTip\Appearance\Appearance.lua:299
[C]: in function `SetSpell'
...Ons\HealBot\Libs\LibHealComm-3.0\LibHealComm-3.0.lua:230 in function <...Ons\HealBot\Libs\LibHealComm-3.0\LibHealComm-3.0.lua:205
...Ons\HealBot\Libs\LibHealComm-3.0\LibHealComm-3.0.lua:928 in function <...Ons\HealBot\Libs\LibHealComm-3.0\LibHealComm-3.0.lua:924
...Ons\HealBot\Libs\LibHealComm-3.0\LibHealComm-3.0.lua:1553 in function `?'
...Ons\HealBot\Libs\LibHealComm-3.0\LibHealComm-3.0.lua:18 in function <...Ons\HealBot\Libs\LibHealComm-3.0\LibHealComm-3.0.lua:18

Locals: (*temporary) = <unnamed>TextLeft6 {
 0 = <userdata>
}
(*temporary) = "Fonts\FRIZQT__.TTF";
(*temporary) = -1.#QNAN
(*temporary) = ""

Please provide any additional information below.

If you feel I need to pass this along to the Author of Healbot I can do so.