Flash's fragile debugger still a problem in CS4/CS5?

Here's a simple bug in Flash that cost me hours in frustration and mental stability. Its no wonder Jobs thinks the code isn't up to par. However this bug exists on Windows as well.

1) Start Flash CS3
2) Type a line of code in AS3 anywhere
   i.e. trace("Hello World");
3) Set a breakpoint

Now here is the fun part, name the file beginning with a numeric, i.e. 123HelloWorld.fla

The breakpoint will NEVER get activated. Now rename the file HelloWorld123.fla, breakpoints work.

It turns out that any filename that begins with a number simply won't debug. Nice to know.

Does anyone know if this trivial occurance still happens in CS5?