Since switching from version 1.7.1 to 1.7.2_RC8 I've noticed a lot of the screen resolutions show as unknown whereas before I did not have this problem.
unknown 487 1366x768 72 1680x1050 41 320x480 50 1280x800 48
They all seem to be IE based browsers with few exceptions, attaching section of piwik_log_visit table as CSV for more details
A byproduct of this problem is that all unknown screen resolutions are being classified as Mobile Screen types, resulting in a majority of the screen types being mobile when they should be in a minority:
Mobile 540 Wide 273 Normal 90 Dual 1
Attachment: Section of log_visit database as CSV
Problem is in piwik.js
This is since detectBrowserFeatures() sets res and due to the new regex check that doesnt call the function if it detects "MSIE" in useragent (Row 1977 in https://github.com/piwik/piwik/blob/master/js/piwik.js).
I don't know how to compress .js like it's done here so could use some help.
Haven't found where unknown screen resolution defaults to mobile yet.
I don't know the routines for suggesting changes here so if anyone wants to grab this and improve/move forward I would be thankful.
Suggested changes for piwik/plugins/UserSettings/functions.php
Suggested changes for piwik/piwik.js
Should be looked over for optimization