Text Wrangler 4 update

I'm also having this issue. It has something to do with the bolded line but I have no idea how to fix it. Hopefully someone has a solution?
Here's the compiling script I'm using.

tell application "TextWrangler"
save text document 1
set the_file to file of text document 1
end tell

set AppleScript's text item delimiters to ":"
set source_file to the last text item of (the_file as string)

tell application "Finder"
set the_folder to container of the_file as alias
end tell

tell application "Terminal"
activate
set shell_script to "cd " & (quoted form of POSIX path of the_folder) & ¬
"; javac " & source_file
if (count windows) is 0 then
do script shell_script
else
do script shell_script in the front window
end if
end tell

Update: Found a quick fix for now. Just uninstall TextWrangler 4.0 and reinstall the previous version
Here's a link: http://www.barebones.com/support/textwrangler/updates.html