.Hex file was modified by Repository

Hi,

I push a .hex file which is generated by avr-gcc a few days ago.Its size is 5.63KB.

When I download it,I find its size has changed to 5.51KB!This file can no more be used.

So I have to make it to a .7z file ,then push it.But this file is too big,and my net speed is very slow.

My TortoiseGit version is 1.8.4.0 ,git version is 1.8.1.msysgit.1.

What Shall I do?Please forgive my bad English.

thx~

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