Please describe the problem:
Since upgrading to 2.8, I've noticed some artifacts on two widgets: a
GtkExpander and a GtkCalendar.  The expander's arrow can get misaligned and the
calendar doesn't turn inactive when it loses focus.

Steps to reproduce:
For the Expander:
1. Change the displayed label from one line to two, or vice versa.
2. Notice that the expander arrow is misaligned.
3. Mouse over the expander or its label to correct.

For the Calendar:
1. Select the calendar to make it active (it turns the active color).
2. Select another window to make it inactive.  Notice that it doesn't change
color immediately.
3. Pass another window over the calendar (while it is inactive) to see it turn
inactive.

Actual results:


Expected results:


Does this happen every time?


Other information: