If you are having trouble with the Instructables website, try using Firefox Answered
Officially, we support Firefox, IE6, and IE7. Unofficially, everyone here uses the site on a daily basis with Firefox. If there are bugs specific to another browser, we often won't notice them right away. This is particularly true of Safari, where lots of things are known not to work. So, if you are having trouble with something (uploading images, operations within your library), try doing the same thing with Firefox and confirm that it's not a browser specific bug. Thanks for your patience as we aim to make everything work perfectly all the time!