[gedit-list] 'C' syntax highlighting mystery

[Pseudo Nym <pseudo nym ukgateway net>]

I am writing an application in C which will eventually carry out a 
process on selected files.

As an intermediate development step I have the application copy a C 
source file, 'source.c' to another folder using fread and fwrite.

The copied file looks identical when viewed with a hex editor, and it 
has the same permissions as the original.

When I load the original into gedit, syntax highlighting works, but when 
I load in the copy there is no syntax highlighting.

If  I make a copy of the copy using 'cp' or copy & paste in Nautilus, 
the new copy has syntax highlighting when loaded into gedit.

Can anyone explain this behaviour please?

Thanks,

Kevin