i have created a Application like a browser:
every dialog is a new Tab and the user can open / close new dialogs (Tabs)

after a while the client is very slow
the client consumed ~700 MB but only 3 Tabs are open

i have check the HeapDump and most Instances are from CSS classes:
http://194.25.240.197:9980/prod.memory.css.png

I have created a test application
194.25.240.197:9980/StyleManagerMemory.zip
http://194.25.240.197:9980/test.memory.css.png

[add] creates a new Tab
[clear] removes all Tabs
[replace] removes the TabPane
-> after [replace] all Instances from 'GuiController' was freed
-> but not the CSS classes


i have not tested with 1.8
i need a solution / workaround for 1.7

my customer use to many system with XP Embedded SPE without 1.8 Support :/