The following will help if:
1) You are using v2.0.1 of µTorrent
2) You have an upload speed limit set in µTorrent
Basically the new version of µTorrent calculates your bandwidth limits a little differently and by default includes protocol overheads in the calculation. So, if you set a low upload limit of something like 16kB/s you are effectively limiting your download speed to somewhere between 150kB/s and 200kB/s.
Fortunately you can disable this calculation as follows:
1) Navigate to Options / Preferences / Advanced in µTorrent
2) Find the item net.calc_overhead and set it to 'false'.
Your speeds should return to normal.