i to have the same problem, but with my *.mpg files, if i have an 10min mpeg in C:\ called x.mpeg and replace it with an 20min mpeg with the same name, WMP display 10min but plays all the way through to the end; if i change the name to x1.mpg, it displays 20min now that i think of it, it doesn't really seem that we have the same problem.