A small blogpost about a new version of the ga.js file that was launched a week ago. As you can see they changed the way customvars are being reported:
"Fixed a bug in Custom Variables that caused some values to be encoded in reports."
Spaces (and other characters) were reported as "%20". So if my name was in a customvar it would look like this:
But as of may 18th it's being reported as:
The advantage is that you get cleaner reports with nicer values, but your graph for certain customvars will look like this:
The traffic for the old ones drop, and new customvars will rise. So don't be scared when you miss a specific customvar, just look for the cleaned-up version 😉