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The "Plugins" table under "Visitors" - "Settings" shows following strange behavior:
1. The visits percentage with Flash plugin is shown above 100% (102.1%)
2. The shown percentage seems to be inconsistent with the absolute number of visits. E.g.: if 60 visits corresponds to 100% ("Cookies"), how can 39 visits correspond to 81.3% ("Pdf"), and so on.
See attached screenshot for information. This seems to be related to #1496.
It doesn't get asked in the bug submission form: Piwik version 1.7 is meant. But I'm not sure how long this has been around, maybe I just never noticed.
Thanks for the report, it seems there is a problem indeed.
Cookie and Java - includes IE users, so:
The other plugins exclude IE users. It looks like one non-IE user changed their user agent to masquerade as IE, this means the Flash detection is over-reported (49 instead of 48).
This is confusing to users given that the widget currently has the footnote:
Note: Plugins detection doesn't work in Internet Explorer. This report is only based on non-IE browsers
but is obviously not accurate given the above explanation.
(In ) refs #2962 - no hope of IE ever supporting plugin detection; so disable it from the start
(In ) refs #2962 - don't correct for IE
Now... what to do with historical data?
Oh good guess about browser faking IE user agents. Your solution looks good.
About historical data: maybe we can cap the percentage at 100% max if it could be higher for previous days?
(In ) fixes #2962 - add RangeCheck filter
(In ) refs #2962
I noticed that the value for 100% is displayed as "100" but other values are correctly displayed with % sign "88%"