The Drupal 6 version of jQuery is too old (1.26). Could I delete, and replace it with a newer version?
As of 14 August 2011, the jQuery library used by the latest Drupal 6 version of jQuery Update is 1.3.2; jQuery 1.2.6 is the version used by the latest Drupal 5 version.
No, that would not be advisable; instead, use the jQuery Update module.
I wrote a post about using noConflict + your custom jQuery version and scripts here: http://drupal.org/node/1058168
For what it's worth:
- Drupal 5: jQuery 1.2.6
- Drupal 6: jQuery 1.3.2
- Drupal 7: jQuery 1.5.1 and jQuery UI 1.8.11
With the release of IE9 imminent, and jQuery 1.5.1 release was made to fix all bugs related to IE9, does it make sense to put this release into D7? Their changelog suggests many IE related bugs were fixed.
"jQuery now supports Internet Explorer 9 as a top level browser. All known bugs have been fixed and/or been reported to the IE team for resolution in the final release."