Copying formatted text from a web page to an Applescript input dialog

I have an Applescript which - simplified - looks like this:

...
display dialog "foo" default answer ""
...

One of the users of this script runs Lion. Whenever he tries to copy/paste a string to the input dialog, that won't work if the origin of the copy has got some formatting (e.g. the string is copied from a web page). Everything works fine under Snow Leopard.

Any hint on why this happens?

I've found the same thing -- if I copy/paste from TextEdit in Rich Text mode, I cannot paste into the input field. If I change the mode to plain text, it works fine.

Here's an Applescript I found that worked for me. It works by converting the clipboard to plain text:

try
  set the clipboard to string of (the clipboard as record)
on error errMsg
  display dialog errMsg
end try

You need to make it an executable script and then bind it to a keyboard shortcut. After that, whenever you copy some formatted text, execute the keyboard shortcut and you can then paste the text without problems.

set variable_name to (the clipboard as text)

I tried to reproduce the problem with

on run
    set dialogResult to display dialog "foo" default answer ""
    set newText to text returned of dialogResult
    display dialog "Text entered: " & newText
end run

but at least at first sight it appears to be working ok. Which specific issue did you run into ("won't work" is a bit broad)?

Update

The problem has been fixed in OS X 10.8, just got a mail from [email protected]:

14-Sep-2012 07:40 PM Apple Developer Bug Reporting Team :

We believe this issue has been addressed in OS X 10.8 (Mountain Lion) GM Seed (Build 12A269). This pre-release version is available now on the Mac App Store to Mac Developer Program eligible members.  Please verify with this release and update your bug report with the results.