More information is available at the community portal. You may ask questions at the help desk, village pump or on IRC channel #wikimedia-commons (webchat). You can also contact an administrator on their talk page. If you have a specific copyright question, ask at the copyright village pump.
PNG is a poor file format for most photographs for two reasons: (i) larger file size, (ii) wikimedia renders JPG much sharper than PNG upon rescaling (it reduces the PNG shapness when generating a thumbnail). Materialscientist (talk) 00:10, 1 March 2012 (UTC)
Authority control on Creator pages
Hello. I just wanted to let you know that I have granted autopatrol rights to your account; the reason for this is that I believe you are sufficiently trustworthy and experienced to have your contributions automatically sighted. This will have no effect on your editing, and is simply intended to help users watching Recent changes or Recent uploads to find unproductive edits amidst the productive ones. Thank you. INeverCry 00:33, 12 September 2012 (UTC)