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Mixed
Smooth
Humility
gtk, cancel
IndianRed
48x48
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Social media
Elegant Media Icons
Ask
64x64
Bebo
yahoo
UI
Snowish
help, Gnome
128x128
important, Emblem
Dialog, Error
Computer & hardware
Futurosoft
nero, fire
Carpelinx
Folder, locked
Desktop apps
KDE Crystal Diamond
messagebox, Critical
22x22
Vista Inspirate
stop
32x32