SAS Enterprise Guide 4.1 has a new hotfix available:
http://ftp.sas.com/techsup/download/hotfix/ent_guide41.html
As usual, this hotfix is a cumulative collection of fixes -- it's the only hotfix you need to apply for the SAS Enterprise Guide 4.1 client.
If you installed the recent release of SAS Enterprise Guide 4.1 with the updates for Vista support (version 4.1.0.1000), this hotfix is still applicable. There is a small collection of updates in this hotfix that are more recent than that release.
Chris