If you have faced a situation when a program icon in the notification area is lost after you have updated the corresponding program in Windows 7 or in Windows Server 2008 R2, then this post may interest you.
Program icon in notification area lost
Lets say, you have a program icon being properly displayed and visible in the notification area.
You update the said program.
The program icon goes missing or is moved to the hidden overflow area!
If such cases where your program icons play hide-n-seek you may want to apply Fix292654.
Microsoft has released Fix292654, that lets you automatically fix this issue. Visit KB976883 to request the fix.