After the upgrade, the primary timeline chart was missing the time series selection panel and all the charts were displaying all series simultaneously. I reformatted the individual reports to match the settings in a demo version of 7.1 I have available, and while the primary report now behaves as expected, I cannot link the series in the other reports - the Series Selection icon is not available when I edit the dashboard.
I've applied the same patch to my demo version of 7.1 and did not get the error. I also tried opening the tutorial Series Selection dashboard on the customer's installation, and that too is 'broken' - no time series selection panel in the top report and all reports showing all the series. I also tried creating the customer's version of the dashboard from scratch, but that made no difference.
Thanks for the detailed info.
I have managed to replicate your issue and have raised a defect (TASK ID = 194508) to be fixed for the 7.1 June release.
Unfortunately in the meantime, it seems the only way to fix this is to actually re-create the dashboard from scratch.
Sorry for the inconvenience this has caused.
Also in future, if you have any defects, just send these through directly to email@example.com, it will allow us to log the defect against your org and automatically notify you once it has been fixed .
Let me know if you have any questions or concerns on this.