When upgrading from 2.3.1 to 2.4 I got the following error:
A Database Error Occurred
Error Number: 1146
Table ‘exp_developer_log’ doesn’t exist
SELECT COUNT(*) AS `numrows` FROM (`exp_developer_log`) WHERE `viewed` = ‘n’
Filename: models/tools_model.php
Line Number: 257
I have gotton around this by just creating the table from the mysql schema in the installer, but thought I would flag it.