Our company's software is used in 1,800 school districts with 81,000 users. We serve the special education community, where a very large percentage of users are Mac based. This issue is consistent with what our beta group has been reporting and actually, I've found inconsistency only when working with applets. CuteSoft's v6 implementation for Safari has drastically improved the feasibility of using CuteSoft on Safari.
We are using other file uploading,, online chat, and AJAX controls without issues. Our experience with CuteSoft is also consistent. And for us, it's consistent that since the last May 16th update, the code snippets were fixed, but it's behavior was changed to append the code to the top.