Hey Michal
We have a similar Problem... our first customer had the Problem that we couldn't open a Java program - AppCrash. This was on the 11th April (using ESET EAV v5). A week later, on the 18th April, we had 5 customers (3x EAV v6, 2x EAV v5)with similar errors. One of the customers couldn't print at all from a Java program.
All errors were resolved as soon as we disabled the protocol filtering.
I'll add the dump as soon as I can.