Can't change Mail icon. Other apps change OK.
I notice that on the Clipboard the icons I've copied there in any format, whether directly or from Preview, are identified by Clipboard as .tiff. The one exception is via IconDroplet, which on Clipboard is identified correctly as Apple format, but still won't paste into Mail Get Info.
Have tried: relaunch, reboot, repaired permissions, and the steps above. Thanks for any recommendations!
iMac 2.93 GHz Intel Core 2 duo w 4GB, Mac OS X (10.6.6), Mail 4.4