I tried to get the Linux client to work properly under 64-bit Ubuntu 10.10, which was pretty hit and miss really. The client is only available for a 32-bit Linux, and doesn't work out of the box in 64-bit mode- it fails with an error regarding missing QT libraries.
I did eventually manage to get it to work running on 64-bit, by downloading and manually linking to the 32-bit QT libraries; and resolved a crash to do with sound by passing it through a Pulse audio emulator (padsp. But even then it had some strange issues, like not displaying the top message in a conference, and getting the message list all corrupted.
My recommendation- use the Windows version of the FirstClass client under Wine. Wine allows you to run (apparently not emulate) Windows applications on your Linux machine. For me it has worked so much better than the Linux version.
Here's how to do this in Ubuntu:
- Go to Ubuntu Software Center and search for 'Wine'.
- Install the 'Wine Microsoft Windows Compatibility Layer (Beta Release)'
- Next, go to http://www.firstclass.com/Divisions/Resources/?Plugin=FC&OpenItemURL=S047C50E4 and download the latest Windows client (Win XP, Vista, or 7).
- If you try to run the installer straight from your web browser, you'll get an error about "Blocked: The file '~/Downloads/FC11005US.exe' is not marked as executable."
- Open up your Downloads folder under Places and find the file you downloaded (something like FC11005US.exe).
- Right-click the file and go to Properties.
- Under the Permissions tab, tick Execute - 'Allow executing file as program', then Close.
- Then double-click the file, follow the prompts, and install using the defaults.
- Now you can go to Applications - Wine - Programs - FirstClass - FirstClass to run the client.
- If you need to add a different server- click Advanced, and Setup- and enter the name of the server beside 'Server'.
