The following bug has been logged online:
Bug reference: 1237
Logged by: Chris Dipple
Email address: chris(at)secpay(dot)com
PostgreSQL version: 7.4.3
Operating system: Linux
Description: text_field like 'abc%' not using index on text_field
Details:
Upgraded from 7.2 to 7.4.5. Old queries now do not use index that were used
before. See short decription.