Hi Hopey and all
I am so glad (not much help to you) but I am having the same problem and tried a google search to find an answer. Well I stumbled across this site. So we now have proof that it is not an isolated incident and it is widespread. Below is a copy of what I sent to samsung. I am sure it covers most things but your comments will be appreciated (I am not trying to hijack your thread Hopey but just trying to get you and me an answer) I have registered on this site only because of this thread. I will post the reply from samsung on this thread if that is ok. well here is that email it is fairly long but think it covers everything.
Dear Sir/madam
I still have my problems as stated in my last emails but to clarify I will explain FULLY the events that have unfolded. It is fairly long but hopeful will cover all aspects and answer you questions regarding of the problem.
I have had my new Samsung D900 (I actually have 2 phones with me,1 for my partner) for around 10 days now. I inserted my PC studio disc (Ver: 3.0.1 FFA)to use with my USB connecter.
Now for the problems
The software installs ok it recognizes my phone ok it copies my phone book and SMS messages to PC. It even shows my icons for my jpeg pictures and MP4 video that I have on my phone (so far so good) no connection problems.
If I try and copy pics (and vids) to my pc. If it is below 50KB (not large I am sure you will agree) there is no problem.
Problem 1: Any file larger than 50KB and There will be 1 of a few problems that occur, a pop up will displaying 'CM_ERROR_READFILE' after transfering say around 20% of file then stopping or 'Unknown Error' or software will just freeze.
Problem 2: I can't send a SMS via my PC because the last few letters I input are ommitted when the message is sent.
Problem 3: If I try and transfer a jpeg image from my PC to my Photos folder on my phone then I will get 'operation not possible or not compatable with the destination'. I am aware that the resolution has to be a certain size and that is not the problem.
I have emailed before regarding problems 1 and 2 here is the reply I received:
'In response to your query, I am sorry to hear of the trouble you have
had in using PC Studiowith your phone. The first problem you mention
is something I have not yet come across - if you have already tried
reinstalling the softwarefrom
Samsung Mobile, I would
recommend attempting to install the software on another machine to rule
out any issues with your PC. The second problem is something I have
heard of before - it may turn outthat this is not resolvable, but I
will investigate this for you. Could you let us know which version of
PC Studio you are using (ie PC Studio 3.1.1FK

and if possible try
running PC Studio on another PC? Thiswill at least rule out a problem
with your own PC.'
To rule out problems at my end and in response to the email all my problems have Happened even though
I have tried both Discs, both usb connectors, both phones and 2 different PCs.
These have also happened before and after I had installed updates.
The same as happened when I downloaded the latest version from the Samsung website (Ver: 312 GEA)
Each time I have done a fresh install I have uninstalled the previous software and restarted my pc.
My main complaint is regarding problem 1
I have phoned twice the first time was not satisfactory but at least the lady at customer services tried but the final reply was try this and that and if that doesn't work I don't know but will email colleagues to find an answer. Polite but not very proffesional and no reply.
The 2nd time I phoned on Wednesday 20th June evening. I was told to uninstall my firewall and ANTIVIRUS yes ANTIVIRUS before I try and install software. luckily I was a bit clued up on internet security not to uninstall my ANTIVIRUS. The lady then advised that she would phone me after middday the next day (Thursday 21st June. It is now late on Friday afternoon and I am still waiting.
Also regarding the email response of not hearing of problem 1 before if you read some messages in the following links to these forums.
Samsung SGH-D900 - Support Forum - eXpansys UK Support & Discussion Forums - eXpansys UK
you will find problems with the software is rife and people are not bringing it to Samsung's attention maybe because after visiting forums they start using a micro SD card or Bluetooth instead of the USB cable which seems to be the cause of the problem highlighted. But this problem should be rectified and not brushed under the carpet. If there is a problem with the USB cable then perhaps one should not be supplied with the software and instead supply a micro SD card or bluetooth adaptor OR RECTIFY THE PROBLEM. If the problem is with the software then perhaps the software should not be issued with the phone OR RECTIFY THE PROBLEM.
Summary:
I got this phone because it has a good quality camera and I can transfer photos to my PC via a usb cable so won't have to purchase any additional products(wrong) to print my pics.
I also got this phone because of Samsung's increasing popular reviews.
regarding the phone itself I am so far very happy with it and would reccomend it. As for the PC software I am very dissapointed, in this day and age it is an important factor when buying phones. 'Please do not brush this under the carpet'. Depending on the response I get will help me dicide whether or not I take my phones back to the shop and whether or not I will purchase Samsung phones in the future. A few of my friends and family are looking for new phones and at present will discourage them from this if they want to use it with their PC. I look forward to a positive response.
Kind regards
that would be my real name which I shouldn't publish here mind just read that Henry has gone to Barcelona that is big news. (not an Arsenal fan..or spurs)