Descriptive Problem Summary:
alpha with client.screen over map makes the portion of the object over the map have a different alpha than screen object outside the map view bounds.

hard to explain problem, giant gif should show:

http://puu.sh/ldBK2/99abc9bc4b.gif

Code Snippet (if applicable) to Reproduce Problem:
This is my entire project
http://puu.sh/ldDcP/4e98a4a43c.zip

Expected Results:
everything alphas consistently

Actual Results:
things do not alpha consistently

Does the problem occur:
Every time? Or how often? all the time
In other games? yes
In other user accounts? someone confirmed
On other computers? someone confirmed

Did the problem NOT occur in any earlier versions? If so, what was the last version that worked? (Visit http://www.byond.com/download/build to download old versions for testing.)

idk

Workarounds:
have a solid color screen object cover the whole map, under the alpha-ing screen object