Problems copying to SMB network drive

In glancing at the forum posts, I see that most people are having problems with SMB network drives. I thought I would post my experiences and see if they might lend some insight into correcting the issues.
I recently purchased a Coolmax CN-350 NAS, which works as both a SMB and FTP server. It shows up on my list of Shared drives just fine in the sidebar, and I can connect to it just fine through the finder. However, copying to the drive produces a "The Finder can’t complete the operation because some data in “About Stacks.pdf” can’t be read or written.(Error code -36)" error. The item I copy (text file, movie, pdf, etc) shows up on the drive anyway, but it is empty. Nothing new so far, based on what I've read in the forums. I tried copying some files to the NAS drive via FTP and they seemed to transfer just fine. I also can copy files to the NAS via SMB using muCommander. Saving to the NAS from some applications that I've tried so far seems to work (TextWrangler, Pages, Preview) though not from others (QuickTime Player, Illustrator CS3, iTunes). I can't double-click to open the files I created, or moved to the NAS via FTP, but in all cases I've tried so far (movies, pdfs, text files) I can open them from within the application.
Copying from the NAS seems to work without any issues. Files copied over to the NAS via FTP will copy back to the Mac without any errors, and the copied files will open just fine when I double-click them on the Mac, with no information lost.
I've tried some of the solutions & workarounds proposed in the forums here (numerical passwords, logging into the directory directly rather than just attach the drive directly, etc) but from what I'm reading around here, the problem seems to be with the Finder and how it sees the SMB drive. As a side note, when I checked Console, the message it gave for when I tried to use the Finder to copy files to the NAS, it gave the following message:
"10/30/09 9:45:05 AM kernel smb_maperr32: no direct map for 32 bit server error (0xc0000161)"
I'm hoping that this might help someone more clever than I, or perhaps even someone working on 10.6.2 so that this issue can be resolved in the next update. I'd like to think that this isn't some sort of subtle sabotage on Apple's part to try and encourage people to buy Time Capsules; they are cool of course, but I really can't afford one just to make NAS easier. Hope someone can make use of this.

Pretty much same story here. After upgrading to Snow Leopard I could copy things from the SMB drive to my local drive, but not open them by double-clicking.
I also got the -36 error code when I tried to copy files from my local drive to the SMB drive. BUT until about a week ago, I was able to copy the files via the terminal but that stopped working this weekend, which was kind of strange.
I installed the .2 update tonight hoping that would fix it but it didn't. I looked in the console and spotted the SMB error. Searched on Google and this was one of just four results! But I did search for the whole log entry.
Anyway Joseph, if you do find a solution, please post it here and I promise to do the same.
Good luck!
J

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