How does Konqueror identify text file types? (c, cpp, h, hpp ...)

I have some C++ header files as *.h which Konqueror identifies as "Java Source File"s. If I rename those files to *.hpp Konqueror correctly identifies them as "C++ Header File"s. I have some C header files as *.h which Konqueror correctly identifies as "C Header File"s. But there are also other C header files as *.h which Konqueror calls "Plain Text File"s. I am totally confused as to what logic Konqueror uses to identify the sub-category of a plaintext file. -- Tux #395953 resides at http://samvit.org playing with KDE 3.51 on SUSE Linux 10.0 $ date [] CCE +2006-03-25 W12-6 UTC+0530