Gentoo-linux: 2006.1
Samba: samba-3.0.22-r3 (also samba-3.0.23a)

Under MS-DOS with MS-CLIENT we use filenames containing an @. This is de default space replacement in Siemens STEP5.
 
From Dos->Linux the conversion of filenames works perfectly, the files are properly diplayed on the filesystem as on other windows 2k/XP systems. 

However, from Linux->Dos the conversion doesn't work properly, whenever there's a character like @ of # dos scrambles up almost the entire filename. At this moment, it looks like the first character of the filename states correct, but every following character is not likely to be one of the characters which it should be. Even when a file is only two characters long, if one of them is an @ the filename gets way too long and samba mangle it to an even more unreadable filename. I've tried several settings like charsets and dos filename attributes etc. 

example:

winxp
linux -> dos
h@       hp1q68~5

I've located a bug report, https://bugzilla.samba.org/show_bug.cgi?id=1521 which state is still new, that could be the sollution. However, it's not for the same version so I'm trying to tweak it. I've also considered this could be a problem with MS-CLIENT. But before samba we used a windows NT server machine that didn't have this problem.

As well as on Dos as on Linux there are no logfile entries