Sorry I couldn’t see how I could comment on that ticket.
I tested it a lot earlier and didn’t have any problems, but just now I tried out multi-selection on the List of Keywords and soon got the following error.
Fatal error: Maximum function nesting level of ‘100’ reached, aborting! in /home/www/dev5.piwik.org/core/DataTable.php on line 116
The pop up window would open but there wouldn’t be any graph. I was also getting this in that window:
Metrics for Keyword: fatal error: exception thrown without a stack frame in unknown on line 0
Also I would like to make a suggestion please that the multi-selected items are highlighted as you go. At the moment there is no indication of which ones have been clicked.