FULL PRODUCT VERSION :
JRE 1.7 Update 79, JRE 8 Update 45.

ADDITIONAL OS VERSION INFORMATION :
Windows 7, IE10

EXTRA RELEVANT SYSTEM CONFIGURATION :
Connection by HTTPS, Java applet, Liveconnect

A DESCRIPTION OF THE PROBLEM :
The java plugin is making an extra HTTP call to the page that embeds the applet.

This page is accesible by https with client certificate, so Java VM displays a popup asking the user to select a client certificate (when we call a java method by liveconnect).

The problem is the same that:

https://community.oracle.com/message/12504503#12504503

And it's similar to:

http://bugs.java.com/bugdatabase/view_bug.do?bug_id=8046211

ADDITIONAL REGRESSION INFORMATION:
Until Java 7u51 everything worked fine.


REPRODUCIBILITY :
This bug can be reproduced always.