Description of Problem:
When a chart is exported to html, the last task is not correctly placed
on the time schedule. The last task is placed first in the chart, even
though it's scheduled to conclude at a much later time.

Steps to reproduce the problem:
1.  Create a chart.
2.  Add some tasks with different starting dates and duration.
3.  Export chart to html and view in web browser

Actual Results:
The last task is not aligned at it's correct start and end date. See
link below for example. The task "Dokumentrevidering" comes at first,
but is according to the task list scheduled to last from 8th of december
to the 13th.
<URI: http://kriberg.tihlde.org/greier/gantt.html>

Expected Results:
The task should be placed at the end of the document, correctly aligned
with the dates.

How often does this happen?
Just about every time the document is exported to html. Even if I add or
remove tasks, the last scheduled one get's wrapped at the beginning of
the chart. Opera, mozilla, IE and epiphany all produce the same
results.

Additional Information:
Planner 0.12