After upgrading from KDE that comes with Linux Mint 14 (I upgraded to KDE 4.10), the borders for the widgets are corrupted. This includes the Kickoff Menu as well. I got most to correct themselves by removing the widget and re-adding them. But then if you resize them (as in the case of the calendar on the upper right), then the boarders are corrupted again. Please see image attachment link for a visual of this problem.

Reproducible: Always

Steps to Reproduce:
1. Add the Calendar widget and LCD Weather Widget that comes with Linux Mint 14 KDE version. This is important that those are installed and running first so you can see how it corrupts the boarders after update.

2. Upgrade Linux Mint 14 KDE version to KDE 4.10 using the steps in http://forums.linuxmint.com/viewtopic.php?f=109&t=124912#p684113

3. Reboot and then try to resize the calendar widget, hover over the Kickoff button, click the Kickoff button and you'll see again, the borders are a problem.

4. Remove the Kickoff button from the bottom panel and re-add it. Click on the Kickoff button and the borders are ok. But hover over the button and the borders are corrupt.

5. Remove and re-add the calendar widget. Now remove the daily notifications and then go to your country and select "none" for the type of calendar in the bottom scroll box. This makes the calendar just the monthly calendar. Now try to resize it. You'll see there is corruption on the corners and it becomes more transparent.

Actual Results:  
Borders become corrupted after trying to resize the calendar.

Expected Results:  
The widgets should have kept the same transparency level and border style while and after resizing.