Vista lock the files when I index an UNC path...

Hi,

When I download and activate the search add-on to search and scan UNC shared
folders, Vista lock the files when I edit them.

For example, I open a word document from an UNC folder, and when I try to
save it, Vista says the file is allready open. So I have to save the file
under another file name.
If I deactivate the search to scan my UNC folders, then everything works
fine.

any idea of what can I do?
thanks.

Jerome.