Hi friends ,

I am using qtip plugin of jQuery. It was working fine when I was jusing jQuery 1.3.2 but when I switched to jQuery 1.4.2. I started encountering this error "this .data qtip is null" . How can I fix it ?

I have experienced that using different versions of JQuery library makes some of the third-party JQuery plugins to become useless or simply nonfunctional.

My advice is to get back to jQuery 1.3.2 and check from time to time for newest version of qTip plugin - they will need to make it compatible with the newest version or you will need to do that manually by modifying the qTip plugin code.

Hmm... so you are using 1.4.2 do one thing, go here :http://bazaar.launchpad.net/~craig.craigsworks/qtip/1.0/files and download the latest 1.0 qtip version, the issue has been fixed in this version and is compatible with 1.4.2.