# \[F\] Changing case of file extension causes file icon to change

**URL:** https://community.mp3tag.de/t/f-changing-case-of-file-extension-causes-file-icon-to-change/17081
**Category:** Fixed Bugs
**Tags:** bug-fixed
**Created:** [July 22, 2015, 5:24pm UTC](https://community.mp3tag.de/t/f-changing-case-of-file-extension-causes-file-icon-to-change/17081 "2015-07-22T17:24:41Z")
**Posts on this page:** 1
**Showing post:** 1

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### Author: ![ryerman](https://community.mp3tag.de/user_avatar/community.mp3tag.de/ryerman/32/5285_2.png) [@ryerman](https://community.mp3tag.de/u/ryerman)
#### Post date: [July 22, 2015, 5:24pm UTC](https://community.mp3tag.de/t/f-changing-case-of-file-extension-causes-file-icon-to-change/17081/1 "2015-07-22T17:24:41Z")

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In Windows Explorer, the file icon remains the same, no matter what case (upper, lower, or any combination) is used to write the file extension.  
In my Mp3tag, the file icon changes depending on the case of the file extension.

I suspect a comparison that should be made "case insensitive", is instead being made "case sensitive".

![](https://community.mp3tag.de/uploads/default/original/2X/f/fd9898fd60ac5d6f3300ecaeba762a8bc571c27b.JPG)

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