Hey there. HappyApple here. You can post troublesome issues you've experienced with AJAX Page Loader 1.5.1 here. Or you can go to the new AJAX Page Loader 1.5 web site.
Note: AJAX Page Loader 1.5 (or 1.5.1) is not maintained by <a href=
"http://wordpress.org/extend/plugins/ajax-page-loader/">Luke Howell, author of the original AJAX Page Loader. This is an "unofficial" version made from his. Just wanted to make that clear so people don't go putting their "complaints" and such on the wrong person. ;)