flash actionscript: I have designed slideshows and content in Flash Mx that use a code for
preloaders from a book called Flash MX Magic. I am now using Flash 8, and have
copied the code directly into new projects, and the preloader doesn't work. I'm
wondering if there are differences between the two that would make the
original code useless?

make sure all your variables are initialized: flash 6 would assign allow an
undefined variable that's incremented to start at zero. flash 8 doesn't allow
that. incrementing an undefined variable yields an undefined variable.

also, flash 8 is much less forgiving of typos: myVar is not the same as myvar.

Note that those differences are with regard to what you publish for .. if
its Flash Player 7 or later then you get the changes in how undefined values
behave and in upper/lower case.
--
Jeckyl