[µTorrent 3.0 64-bit experimental 25570]

Something was messed up in 3.0 with disk cache. It reads ~100x more than uploads as being mentioned by Alpha-Toxic in 32-bit thread. Now with the latest build write cache is not being dumped to file. It just feels up and does nothing.

[µTorrent 3.0 (32-bit) Stable Release]

Error: Invalid access to memory location

I selected only one file in the torrent. After viewing the sample I selected the full version and gave it a priority of high and got the error mentioned above. I get it even when doing a "Force Re-Check".

It's a known issue. It happens when there's at least one skipped file in torrent. Workaround is to delete partfile, force re-check, start.