Love the plugin, exactly what I was looking for. I now have around 70 sidebars, and I expect that eventually I will go well over 100.
The problem is that the sidebars respond VERY slow. When I add a new one it takes about 30 seconds to complete. Then when I add for example the text widget and click in the title textfield to type something, it takes about 1 minute before the widget responds.
When I had less sidebars this problem didn’t occur. I also read in this forum that other people also have a lot of sidebars and they don’t seem to have this problem.
Tried in Firefox, and there the page also freezes. It returned to me that the error is in the following script: http://www.yellowtipi.nl/wp-admin/load-scripts.php?c=1&load=jquery,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-draggable,jquery-ui-resizable,jquery-ui-button,jquery-ui-position,jquery-ui-dialog,utils,jquery-ui-sortable,farbtastic&ver=3.4.2:3.
Does this has anything to do with the custom sidebar plugin?