Limits

Hi there.

I read that Flash has certain limits on Movieclips, Bitmaps, Sprites etc. Here is a link about all these limits.

http://www.flashuser.net/general/flash-limitations.html

I just want to make certain something.

What does it mean by:

[FLASH MOVIECLIP]
Drawing extents within:

[LIST]
[]width: -720 to 720
[
]height: -720 to 720 (1,440×1,440)
[/LIST]
??

It gets a bit confusing. 1440 x 1440 sounds ridiculously small. Is there a fixed dimension of a Movieclip (or Sprite) that I cannot go beyond? If yes, how exactly is this limit calculated?

Many thanks.
Felastine.