Timeline -- extra graph line appearing

I’m having a weird problem with the Timeline all of a sudden. I’m not sure what changed other than the load testing data but I’m getting a line running through the graph. It always from the first data point to the last data point (e.g. the slope depends on the data that appears in the graph or browser). The line is stroked in the same color as the graph and appears in both the graph and browser.

Here’s a screenshot:

Anyone have an idea on what might cause this? The container data is sorted by date/time and values seem OK.

Are you using Chrome 18? If so then you are most likely referring to
ticket #8487

It should get fixed for the next release.

That’s it … I updated Chrome. Thanks!