In XenApp 6 environments it can happen that images are tinted blue in a published Photoshop session, for the Windows Citrix Receiver is a fix available which is mentioned here: http://support.citrix.com/article/CTX128332
To setup this for a Linux based IGEL Thin Client or a UDC converted device open the profile or IGEL Setup and set System->Registry->ICA->wfclient->enableoss to disable. In general tweaks like this can be found in the wfclient area in the IGEL Setup or the profile in the IGEL UMS. If a setting is not available it might be a good idea to contact the IGEL support to provide information’s like this to the IGEL development.
Cheers
Michael