Here's a better fix. This allows the successful use of wooden pipes with EE, and should fix your crashed worlds.
To use:
replace "[3]EE2ServerV1.38-bukkit-cb1938.zip" in the /mods folder with this one:
http://dl.dropbox.com/u/8864416/%5B3%5DEE2ServerV1.38-bukkit-cb1938.zip
If you're using the previous condenserpipefix plugin, delete it.