In my opinion dynamic programmers need to embrace the runtime environment and use it as part of their development methodology. Unfortunately most popular dynamic languages have woeful runtime environments.
dynamic languages (like smalltalk) were designed for live coding where the results are immediate, when that is broken and coding is done in a "dead" environment of course dynamic typing will cause problems that arent caught until runtime... but the original idea was one shouldnt have had to wait until runtime in the first place!
Any others?
Unfortunately the same amount of effort that has been applied to static type checking has not been applied to dynamic language environments.
It would have been very interesting to see what could be possible with the more advancement.