Dual monitor with Citrix

Source: http://forums.citrix.com/thread.jspa?messageID=74778&fromSearchPage=true

Swapping the primary monitors worked for me too to fix the seamless app issue.

It looks like the citrix client wants the primary monitor to be on the logical left. If the primary monitor is on the logical right then the client displays the a full window with the app inside instead of just the seamless app.