# Case sensitivity in pop up tutorial?

**URL:** <https://forum.kirupa.com/t/case-sensitivity-in-pop-up-tutorial/176148>\
**Category:** Uncategorized\
**Created:** [January 20, 2006, 7:01pm UTC](https://forum.kirupa.com/t/case-sensitivity-in-pop-up-tutorial/176148 "2006-01-20T19:01:19Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![lunatic](https://avatars.discourse-cdn.com/v4/letter/l/73ab20/32.png) [@lunatic](https://forum.kirupa.com/u/lunatic)\
**Post date:** [January 20, 2006, 7:01pm UTC](https://forum.kirupa.com/t/case-sensitivity-in-pop-up-tutorial/176148/1 "2006-01-20T19:01:19Z")

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Hey Kirupa,

One of the members noticed in the centered pop up tutorial that using Movieclip.prototype doesn’t work for Flash player 7 and 8, though it works fine for earlier versions. Seems it works if one uses MovieClip.prototype (capital C).

Here is the thread:  
[http://www.kirupa.com/forum/showthread.php?t=205566](http://www.kirupa.com/forum/showthread.php?t=205566)

Just thought I’d let you know. 🙂