Alright, well I have gotten this problem a few times in the last few years, but it usually only lasts until my next restart. This time it has lasted 3 days. Problem: My font sizes are about 10 sizes too big. The 6 point font is about the size of an 18 point font. Then just today, I have been unable to transform, move, or do any other actions with any of the marquee (selection) tools, or the move tool. I should let you know however, that this problem only happens on documents that were created after February 25th. All documents before that have normal font sizes, haven't tested the marquee/move tool problem though. If anyone has any idea what is wrong, please help me. I have Photoshop CS2 by the way. Thanks, Papermache.
72 pixels an inch is suitable for web graphics, as any more takes a lot more time to download because of the quality/size of the file. 300 dpi is more suitable for good quality prints.