I have been unable to replace the Alfresco logo on the share login screen with my company logo. I am running 4.2.c Community and believe I am following the right steps, but have not been successful. I created multiple .png files with the different sizes I have read that the file needs to be (48x145, 58x200, 64x450) and replacing the logo.png with it. The Alfresco image is removed, but my image is not shown. This tells me I am replacing the correct file. I tried downloading the Alfresco logo.png to both my Windows 7 and Ubuntu 12.04 systems but get errors when trying to open up the image, even with GIMP. Figured I could look at the properties of the built in logo.png to make sure I am formatting correctly. Not sure what else to try at this point. Any help would be greatly appreciated.