Yes, the jQuery versions are consolidated now. You may have to test what happens if you set 'add no conflict code' to 'none' because now you have 2 of them. But if it works for you like that, I would leave it as it is.

Hello!
A user had a similar problem.
It turned out it was a side effect of the Virtuemart discount module (2.0.8c).

Thank you for your answer!

I have finally come to the bottom of this issue. The answer is very technical.
The jQuery Easy plugin uses the character # to enclose regular expressions. An error in the regular expression finding the noConflict() code declarations was making the plugin select sometimes the few lines preceding the noConflict() code. If it happened that the 'extra' selection would contain a # character, it would trigger a preg_match error.
The version v1.4.3 will try and address this issue.
Thank you Cyril for making your test site available and give me the opportunity to finally understand these random errors (not so random after all).