This is not a Thrive problem, all brands of tablets are having this problem, if they are on Android 3.1, the latest update to skype (ver 188.8.131.52) has bugs
Green screen is caused by the latest Skype update (ver 184.108.40.206) Uninstall this version
Install Skype version 220.127.116.11.
Do not update thrive to Android 3.2 it causes other Tablet problems (non Skype problems), see Tablet forums for more detail.
uninstall your current version of skype.
to download the older version of skype.
this works with the thrive.
1..You must set "SETTINGS >> Applications >> Unknown Sources, allow ..."
2..Just un-install the current Skype first (Settings >>Applications>> Manage Applications >>Tap the"Downloaded" tab >> scroll down to SKYPE, select it >> Uninstall)
3..Click on the link for the working version (18.104.22.168).
Go here: http://www.apktops.com/skype-2-5-0-160.html (this is the 22.214.171.124 version) Go to the bottom of the page and install the app from the link under the bar code. It should download and it should prompt you to install it.
Consider joining the Thrive Forum at http://www.thriveforums.org It is the best forum on the web for new and experienced Thrive owners. It will greatly increase the enjoyment you get from your Thrive.
Best Wishes for a great new year ....
If you need anything else, just post on the Thrive Forum.