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[lupus <649065@xxxxxxxxxxxxxxxxxx>]

The file corruptions were not permanent, it was different files everytime. The files would usually extract without any error messages from winrar, but some files were corrupted or simply missing. We only came to discover this problem by manually comparing directory/files sizes. 
Redownloads using DC++ produced similar errors, but in different files, we used Windows File Sharing and FTP Servers as a workaround and had no corruption issues using those two.
The archives in question were customly created archives of complete installation folders, the idea being, that people would just download those instead of juggling around with setup files. Obviously I can't provide you with these files, but you should be able to recreate the problem using pretty much any program that installs at 2GB+ and in many small files, by packaging it with winrar.
As said, it worked perfectly, when we went back to Windows File Sharing and FTP.

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file corruption issues on big archives
https://bugs.launchpad.net/bugs/649065
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Status in DC++: Incomplete

Bug description:
We recently used DC++ 0.770 as a means to replace Windows File Sharing to transfer files in a private LAN setting.
The exchanged files were mostly big RAR archives between 2 and 8 GB in size, containing a few thousand smaller files. Files would download normally, but end up corrupted somewhere along the road. Usually, the archives would extract normally, but miss some files here and there, or contain corrupted files.
All participating clients were using dc++ 0.770 with default settings, on a variety of Windows OS. The problem occured on Windows XP SP3 x86, Windows 7 x64 and Windows Vista SP1 x64. 
The hub software used was YnHub 1.036, running on a WinXP SP3 x86 machine.
It's probably worth mentioning, that, a few years ago, we used a combination of dc++ 0.6x + YnHub in a similar fashion and environment without any such problems.