I am a newbie in every sense of the word, but I would like to redistribute code under the GPL and have questions regarding copyright. I have obtained some code which is released under the LGPL, but under the terms I have decided to use the GPL instead (LGPL, Section 3), and have changed all files previously bearing LGPL notices to GPL ones. I would also like to modify some other code; but all I basically want to do is change some spelling errors in a Makefile. The GPL section 2a states that any modified code must carry "prominent notices" of modification, but does that mean that any code I modify is copyrighted to me? In other words, so do I put on top of every file "copyright 2006 wala", or do I put "modified by wala in 2006"? I have browsed GPLed code on koders.com etc, and not a single file says "modified by ..."; they all say "copyright". Also, certain header files in the source code say "Types defined within this file are Copyright (c) 2003 Apple Computer Inc." and do not contain any other notices. Am I allowed to distribute those files?