Having some problems with resource forks lately.
Here is a rather concise post on it.
http://offshootinc.com/blog/2007/05/17/say-goodbye-to-ds_store-files-resource-forks-and-thumbsdb-files-on-your-windowsmac-network/
http://kendell.org.uk/2010/09/07/banish-mac-os-x-resource-forks-from-fat32-volumes/
Some commands to take note of.
defaults write com.apple.desktopservices DSDontWriteNetworkStores true
find . -name “._*” -exec rm -rf {} \;