What steps will reproduce the problem? Please provide as much detail as possible.
1. View addon with a specially-formatted comment such as: http://wow.curse.com/downloads/wow-addons/details/ice-hud.aspx?CommentPage=2#530800 . Contents of said comment are provided below in case the perm-link ceases to be valid.

What is the expected output? What do you see instead?
I expected the site to retain its normal output. Instead, the header bar has moved to be on top of the header for the comment itself, and the right side bars (most popular/recommended/similar addons) are all below the comments section. In addition, all comments are indented incorrectly and do not follow the normal flow of

comment
   reply
      reply
comment
   reply

At what time and date (year, month, day) did you get this bug? (Include your timezone)
I am seeing this bug on page 2 of IceHUD's comments section (perm link above). It is currently 4:05PM (CST, GMT-6) Sunday, Auguest 9, 2009.

Please provide any additional information below.
These are the contents of the problematic comment:

Yes, I have 1.5.12

Here is the lua error message I get:

Message: Interface\AddOns\IceHUD\modules\TargetInfo.lua:1009: attempt to index field '?' (a nil value)
Time: 08/05/09 17:23:55
Count: 1
Stack: [string "Interface\FrameXML\BasicControls.xml:
[C]: ?
Interface\AddOns\IceHUD\modules\TargetInfo.lua:1009: in function `UpdateBuffs'
Interface\AddOns\IceHUD\modules\TargetInfo.lua:1137: in function `TargetChanged'
Interface\AddOns\IceHUD\modules\TargetInfo.lua:670: in function `Redraw'
Interface\AddOns\IceHUD\IceCore.lua:263: in function `Redraw'
Interface\AddOns\IceHUD\IceCore.lua:439: in function `SetBarTexture'
Interface\AddOns\IceHUD\IceCore.lua:506: in function `ChangePreset'
Interface\AddOns\IceHUD\IceCore.lua:502: in function `SetBarPreset'
Interface\AddOns\IceHUD\IceHUD.lua:324: in function `setFunc'
...\AddOns\Baggins\libs\Waterfall-1.0\Waterfall-1.0.lua:3458: in function
...\AddOns\Baggins\libs\Waterfall-1.0\Waterfall-1.0.lua:3490: in function

Locals: self =
{
scalingEnabled = true
elementName = "TargetInfo"
alpha = 1
unit = "target"
uid = "1E409AA0"
settings =
{
}
frame = IceHUD_TargetInfo {
}
width = 200
moduleSettings =
{
}
}
zoom = 0.08
filter = false
hostile = nil
(for index) = 1
(for limit) = 40
(for step) = 1
i = 1
buffName = nil
buffRank = nil
buffTexture = nil
buffApplications = nil
buffType = nil
buffDuration = nil
buffTimeLeft = nil
isFromMe = false
unitCaster = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = "attempt to index field '?' (a nil value)"