I can also confirm the issue exists. My machine is windows 7 and I have used Chrome (45.0.2454.101 m), Firefox (40.0.2, 41.0.1) , Internet explorer (v11.0.22 (I can't even open one of my visualisations without gettings an Oops window and it keeps getting into a loop, showing the oops windows and refreshing the screen to show the oops window again)
The chart I'm having problems with is the vertical chart with two filters and showing 1 hour time intervals. The graph is showing a weeks worth of logstash data. If I use the auto refresh the memory usage keeps on increasing, both in chrome and firefox.However if I reload the whole page then the memory usage does not increase.
I can't go live with this bug considering kibana is supposed to be running on our wallboards and auto refreshing the graphs