What does "cleaning" mean... noticed this after upgrading to 5.1

note facebook icon... says "cleaning.." under it. this?



----------

as side note, hadn't updated facebook app time recently, not had finished installing.

 

my guess removing unnecessary left behind files.

 

Forums iPhone, iPad, and iPod Touch iOS Older iOS Versions iOS 5 and earlier

• iPhone
• Mac OS & System Software
• iPad
• Apple Watch
• Notebooks
• iTunes
• Apple ID
• iCloud
• Desktop Computers
• Apple Music
• Professional Applications
• iPod
• iWork
• Apple TV
• iLife
• Wireless