Konqueror "cannot find mime type" errors

[Bogus Zaba]

All of a sudden, when I start up KDE (I usually log off with a Konqueror 
window open) I am getting multiple error messages from "Knotify" which 
all tell me that :
"
Could not find mime type
application/octet-stream
"
Eventually these stop (after OK'ing them all ) and I get  a Konqueror crash.

If I try to re-start Konqueror later during teh KDE session, it starts 
OK with just one single error as above.

I tried deleting the konqueror directory under home/.kde/share/apps but 
this seems to have made no difference to the problem.

Anybody know hwo how to fix this?
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