MagicMime detection of msdos executables does not work

Mime detection does not work as expected (at least from me) in contrast e.g. to sourceforge mime-util detection or "file" utility.
For example using putty ms-dos executable does result in wrong detections:

krah@sf050:~$ java -jar /tmp/tika-app-1.1.jar --detect /tmp/putty
application/octet-stream
krah@sf050:~$ java -jar /tmp/tika-app-1.1.jar --detect /tmp/putty.jpg
image/jpeg
krah@sf050:~$ java -jar /tmp/tika-app-1.1.jar --detect /tmp/putty.exe
application/x-msdownload

Its everytime the same binary resource only with different names.
In contrast using "file" does output:

krah@sf050:~$ file /tmp/putty
/tmp/putty: PE32 executable for MS Windows (GUI) Intel 80386 32-bit
krah@sf050:~$ file /tmp/putty.jpg
/tmp/putty.jpg: PE32 executable for MS Windows (GUI) Intel 80386 32-bit
krah@sf050:~$ file /tmp/putty.exe
/tmp/putty.exe: PE32 executable for MS Windows (GUI) Intel 80386 32-bit

So magic mime detection should be able to detect that this is actually an executable.

E.g. for a PDF it does work:

krah@sf050:~$ java -jar /tmp/tika-app-1.1.jar --detect /tmp/print.pdf
application/pdf
krah@sf050:~$ java -jar /tmp/tika-app-1.1.jar --detect /tmp/print
application/pdf
krah@sf050:~$ java -jar /tmp/tika-app-1.1.jar --detect /tmp/print.jpg
application/pdf

Here Tika detects what is expected.