For the last couple of months, all new windows I opened in Internet Explorer were really small, with a width of about one quarter of the screen, and showed up on the right side of the screen. Trashing Explorer preferences did not fix it since, as I found out today, the default window size for the Explorer is stored in com.apple.internetconfig.plist found in ~/Library -> Preferences. Instead of just trashing this file, which would have required resetting of a lot of preferences, I tried to find the relevant line and just change it.
To do this, first quit Explorer, open the .plist file with the PropertyList Editor (should be the default if you have the Dev Tools installed), open the first three triangles, scroll down to 'InternetExplorerWindowPosition' and open its triangle. The second block of numbers sets the window size; in my case they looked like: 031c045a, 31 sets the height of the window, 45 the width. Change the numbers, save the file, restart Explorer.
Now if someone could find out where the size of windows resized with the green button is set, I would be happy!
Mac OS X Hints
http://hints.macworld.com/article.php?story=20030815122730476