Did you ever get this resolved? We are facing the exact same problem. Very frustrating....
We had a simmilar issue, but not only with the Tray Icon, but also with the logfiles. This is what I got from support this week.Still need to test it though, maybe it can help you.
Install Language = OS Language unless specified via MID.
UI, Alert and Log language: MID and ePO set Preferred Language in HKLM.
Client UI sets Preferred Language in HKCU.
When the Preferred Language setting is Automatic (HKCU and/or HKLM), it will use the next preferred language.
When a process is running as System (e.g. OAS (including Buffer Overflow and Access Protection), and scheduled Scan), the order of preferred language is:
2) OS language
When a process is running as User (e.g. Console, unscheduled ODS, right-click Scan, and E-mail Scan), the order of preferred language is:
3) User language (Language set via Regional Setting).
Thank you very much! I will test it out today.
We used a rather ugly workaroud: We replaced the 0413 mctrayres.dll with the 0409 one. I'd rather use the registry to solve this so I hope the solution you got from McAfee support works.