10 Solid Web Design Mistakes To Avoid

itookool,

2 things jump out here:

1) It would have been nice to have explanations to go with some of them.  For example, why is it a bad idea to disable the back button (#7).  I use it all the time at work when, say, a user clicks the submit button to process a credit card.  You don't want the user to click the button more than once so as to avoid multiple charges for the same thing

2) Why are these mistakes categorized as "solid"?  Just curious.  Does this imply that there are liquid or fluid mistakes or that you can make mistakes (for which I would disagree) and that some mistakes are worse than others?

between, this isn't a personal assault.  I am just trying to understand what's up.