I am posting my comment from IDEA-42472 as a new issue, since it is not resolved and is slightly different from the initial subject on IDEA-42472

It seems, that there is no progress on that.
At least try to fix it in the new 8 version - this is serious and important drawback

I'm trying to help, here is a simple example (attached also)
ThreadDemo.java

public class ThreadDemo extends Thread
{

    private final String name;

    public ThreadDemo(String name)
    {
        super();
        this.name = name;
    }

    public void run()
    {
        for (int i = 0; i < 10; i++)
        {
            //breakpoint at the line bellow - we never stop here?!?
            System.out.println("Thread [" + name + "] : " + i);
            try
            {
                sleep((long)(Math.random() * 1000));
            }
            catch (InterruptedException e)
            {
                e.printStackTrace();
            }
        }
    }

    public static void main(String[] args)
    {
        //breakpoint at the line bellow
        for (char c = 'A'; c < 'D'; c++)
        {
            new ThreadDemo(String.valueOf(c)).start();
        }
    }

}

I start debugging, the first breakpoint is hit - for cycle, then I'm stepping over with F8, several times, the new threads are started and they print in the console, but the execution never stops on the second breakpoint in the run method?!

Breakpoint suspend policy is 'All', toString() and Disable JIT are turned off, Alternate view for Collections too. I'm attaching screen shot of the settings too.

I tested it with Sun's JDK version 1.4.2_17, 1.5.0_14 and 1.6.0_10
Idea version 7.0.4 #7941

It was OK with my previous versions 5.0.x and 6.0.5 (just tested it again with 6.0.5)

Environment: MS Windows XP SP3, Sun's JDK version 1.4.2_17, 1.5.0_14 and 1.6.0_10

Issue was resolved