Percentages in log are wrong

Has this happened anyone else?

Here is a log entry:

Completed in 0.00918 (108 reqs/sec) | Rendering: 0.00565 (61%) | DB: 0.09696 (1056%) | 200 OK [....

The numbers don't quite add up do they? All my log entries are like this. I'm on Rails 2.1.0

Joel.