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People like to blame the OS, which in most cases is completely innocent. The entire dev team uses the 64-bit version of windows 7, so any issues with that particular OS would highly surprise me.
This is not a quick fix unfortunately. To be able to fix this properly we'll need to emulate a poor connection and track where the issues arise. That will take a lot of time and effort that we can't manage right now. It is definitely something we would like to do though.