The following bug has been logged online:
Bug reference: 2467
Logged by: Rae Stiening
Email address: stiening(at)stiening(dot)com
PostgreSQL version: 8.1.4
Operating system: Linux
Description: Documentation
Details:
Table 9-3. Mathematical Functions
Description of the "width_bucket(...)"
"return the bucket to which operand would be assigned in an equidepth
histogram with count buckets, an upper bound of b1, and a lower bound of
b2"
I believe that the lower bound is b1 and upper b2.