On 13/09/2005, at 16.13, Xavier Noria wrote:
Even "ls -a" does not show those "._" files [...] I am not familiar enough with resource forks to be able to guess what's happening on my own.
It is indeed metadata -- they do not exist as files on HFS+ volumes (for Tiger and onward), but with Tiger cp, tar, zip etc. were all “improved” to store the metadata as these ._... files (and restore the metadata when unpacking on a Tiger machine).
I don't know of an out-of-the-box workaround, other than maybe using cat to copy the files to strip the meta data. If you use tar, you can fetch a version of tar not from Apple and use that instead, since it then won't do the ._... files.
As for the metadata containing www.macromates.com, that should be com.macrmates.textmate.«key name», as that's the recommended way to name meta data keys/extended attributes.