Yes; for historical reasons, the version-less schema on the internet is 1.0 - this is to avoid applications that use versions earlier than 1.0.3 from having problems. We were talking about this last week and maybe now it's time to risk breaking those applications for the benefit of avoiding these kinds of issues.
However, I am surprised that clearing the cache and rebuilding did not resolve your issues; it always does for me (and most others).
Apparently, some more work has been done in STS in this area and will be released soon.
Gary P. Russell
Spring Integration Team
SpringSource, a division of VMware