macdeployqt/Mac OS/Xcode version compatibilities

A deployment question for the Mac experts out there...I tried to run macdeployqt for my app and I'm running into a bunch of errors like this:

Log: Using strip:
Log: stripped "STARIS.app/Contents/Frameworks/QtSql.framework/Versions/4/QtSql"
ERROR: "strip: for architecture x86_64 object: /Users/shollen/Qt projects/STARIS-build-desktop/STARIS.app/Contents/Frameworks/QtSql.framework/Versions/4/QtSql malformed object (unknown load command 5)
"
ERROR: ""
Log: Using install_name_tool:
Log: change identification in "STARIS.app/Contents/Frameworks/QtSql.framework/Versions/4/QtSql"
Log: to "@executable_path/../Frameworks/QtSql.framework/Versions/4/QtSql"
ERROR: "install_name_tool: for architecture x86_64 object: STARIS.app/Contents/Frameworks/QtSql.framework/Versions/4/QtSql malformed object (unknown load command 5)
"

Before I get in to this too deeply I want to make sure I'm running compatible software - I found thru searching that it may be related to a version of Xcode so I'm in the process of updating that. I can't really find a good matrix of software versions, so does someone know if the following are compatible version numbers?

Mac 10.5.8
QtCreator 2.0.1 (based on Qt 4.7.0 64-bit); updated the libraries to 4.7.4
Xcode 3.1

Thanks!

scott

ed. Xcode 3.2 is not compatible with my 10.5.8 OS...