last.fm Submission Flakiness

I have amarok configured to submit tracks played to last.fm. If you go there you can see what I've recently listened to.

I get frequent errors in the amarok status bar such as

Failed to submit 'Mining for Gold' and 8 other tracks

and

Failed to submit several tracks to last.fm

I Googled the messages and found many reports of the problem, such as this thread. Most people pointed their fingers at a server problem. I was skeptical.

When, however, I tried to log into last.fm through the web interface and saw it intermittently fail, that confirmed for me that the flakiness lives in last.fm servers.

I saw this thread that suggested resetting the password--even to the same password--cleared the problem. I tried that and it worked. Before, I had dozens of songs pending to be posted. After, they all went through.

Here's hoping that last.fm eventually fixes their infrastructure problems.