Just installed mp3tag 2.38 to see if the problems got better - but no chance.
Still the same problems here, can't write id3-tags to a samba-mounted network drive.
Client OS is Vista Home Premium German, with mp3tag version 2.38
Server OS is Gentoo Linux with a 2.6.19 kernel, with samba version 3.0.24
Here is the relevant stuff from the samba log, log-level 2.
[2007/05/29 23:52:26, 2] smbd/open.c:open_file(352)
temp opened file audio/mp3/xxxxx/01 - xxxxx.mp3 read=Yes write=No (numopen=18)
[2007/05/29 23:52:26, 2] smbd/close.c:close_normal_file(344)
temp closed file audio/mp3/xxxxx/01 - xxxxx.mp3 (numopen=17)
[2007/05/29 23:52:27, 2] smbd/open.c:open_file(352)
temp opened file audio/mp3/xxxxx/01 - xxxxx.mp3 read=Yes write=No (numopen=18)
[2007/05/29 23:52:27, 2] smbd/close.c:close_normal_file(344)
temp closed file audio/mp3/xxxxx/01 - xxxxx.mp3 (numopen=17)
Even on higher Log-Levels no errors can be found. What I don't understand, why does it state "write=No"? Does it mean that he CAN'T write or that he doesn't WANT to write?
I have one other application that behaves the same - the free text-editor pspad. This one can't write to my linux-shares, too. I tried it with notepad++, this one worked like a charm.
But back to mp3tag, I tried it with 2 other ID3-Tag-Editors (thegodfather and TagScanner), both worked right away. Here is an excerpt from the logfile when writing with TagScanner:
[2007/05/30 00:03:48, 2] smbd/open.c:open_file(352)
temp opened file audio/mp3/xxxxx/01 - xxxxx.mp3 read=Yes write=Yes (numopen=14)
It says "write=Yes", beaneath about 15 other open/closes of the same file with "write=No". mp3tag only does 4 open/closes...
So maybe there was some kind of a change in Vistas network code or something? That there has to be done something different to open files from a network drive? I'm clueless 
Is there anyone with my given configuration, Vista on client and Samba on the server side?
Hope we get this solved... Don't want to change my favorite id3-tagger 
Bye, Stephan