After FBX export must resave

I've found a strange bug.
After saving selected objects as FBX from WED 7.84
if i build the level again the map compiler complains
about not finding palette.pcx
If i then save level again and build, the error disappears.
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Please try this out and see if this is the case?

I can not confirm this problem with my FBX test models, but maybe it's related to the textures of the FBX objects? Do they have some unusual format?

Textures had normal format sizes, but it was related to,
as i noticed when i changed them.
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Thanks for your reply.