iFilter generates a lot of Folders

hi,

i installed on windows 2008 r2 ifilter 64bit. works pretty fine indexing service of windows.

but in root folder of d: drive lot of new folders seem created while indexing.

in every folder single pdf file. of them not exist in indexed structure. of them exist doc file.

i have similar setup on server not have these problems. has other documents index.

i once deleted these files , did rebuild of source structure. happened again, there difference in quantity of folders.

any idea how , why created , how can stop behaviour ?

regards wolfgang

Rest