warnings with jquery 1.8

warnings with jquery 1.8

i hav a webapplication which uses jquery 1.7.2. i upgraded todo to 1.8 and in a special configuration of my application i have issues with jquery. i am testing with FF 14.0.1 on ubuntu 11.10.

on loading i get a warning that a script is not responding: jquery.js:4980. i click on continue executing the script and my application works.
when i reload my application again i get the same warning but the issue of jquery seems to be on a different place jquery.js:4865. and when i reload again: jquery.js:2299 .
it seems that the problem is mostly on a different place. 

what can i do to debug my problem?