Current version doesn't display large charts, with x axis of type 'category'

The new C3 version doesn't display correctly the first line for charts having X axis of type 'category', also the X axis text values are not handled correctly.

This was OK in the previous C3 version. Please check:

**Previous version, chart OK:** [http://gtplants.com/c3/c3ok.html](http://gtplants.com/c3/c3ok.html)

**Error in new version**: [http://gtplants.com/c3/c3err.html](http://gtplants.com/c3/c3err.html)

I suspect that the repeated X axis values might have something to do with it but is there any
reason why the X category values shouldn't be repeated? In this case this chart presents values each 10 minutes, over three days and displaying full dates wouldn't make sense...