Avoid time-consuming POST/PUT XMLHttpRequest for Safari 3.1 on Mac

Time-consuming POST/PUT XMLHttpRequest causes a problem on Safari 3.1 on Mac. The request will time-out if it

takes a long time to finish.

A bug was issued in Webkit's bugzilla and the bug was fixed in Safari's latest build (version 528.x). So you can wait for

the new version of Safari.