X-axis time scale in 0.8.0 quite different from 0.7

[TWSheppard]

Please see the following forum posting for screen shots and an example web site that demonstrates the differences:
https://groups.google.com/d/msg/flot-graphs/S9Vqz0FTj1I/J60XIfeDYjgJ

This bug is raised on request by a reply in that thread.

In summary, for 0.7 the x-axis timescale shows data aligned on the hour such as 06:00, 08:00, 10:00. In 0.8 it shows it aligned to the minute such as 06:29, 08:29, 10:29. This is difficult to read as the axis values change every minute.

For intervals of a week where tick marks are days, in 0.7 the values are correctly aligned with the ticks. In 0.8, there is a misalignment such that the tick mark is not at 00:00:00 of that day. The result is that data appears on the wrong day.

[dnschnur]

I've tested against your examples, and Dan's fix takes resolves the problem. Thanks for reporting this, and for providing those great reproduce cases!