I am also having a similar issue where my client (not the application client, but the guy using the app) is experiencing very bad latency. It seems to only happen when he's using a wireless network connection, but when he's wired to the network the applications, through Citrix, works fine. The issue is happening in both Apple and Windows laptop. The client tried in both home and office network, with the same result. The application we are using through Citrix is Allscripts 10.2.7 through Internet Explorer (I think version 6 in our servers. We are using Citrix Web Client 126.96.36.19957; I don't know the exact version number for the Mac, but it's version 10. Another group is in charge of the Citrix servers, and they are not much help either since they are undermanned). The person is using Internet Explorer 7 to get into our Citrix Web login and Safari or Firefox in the Apple laptop. Anyone has any suggestions on how to resolve or further troubleshoot this issue? I will try removing the printers that are locally installed; I will meet the client some time this week.