We may sometimes instruct users to contact us with error codes.

Here's what they mean:
Breakdown of code #s: Codes are 8 digits comprising 4 2 hex digit ID codes.
1 - Server ID (bombplates.com is 01, bands.bombplates is 02, etc.)
2 - Module ID. Make one up arbitrarily. (Unique per module)
3 - File ID. In ascending, alphabetical order whenever possible.
4 - Error ID. Starting from 01 and ascending within the file.
 

Code - Location - Module - File 
 Problem/notes
---------------------------------------------------------
02680201 - Hosted - file_host - file_host.form_alter_submit 
 Error creating merch_item. Details logged to Watchdog
028f0701 - Hosted - html_panel - html_panel.module
 Error created custom_widget. Details logged to Watchdog
01160401 Main - account_forms - account_forms.commands.inc
 Host/server IP mismatch. The client is not trusted to receive commands.
01160201 Main - account_forms - account_forms.artist-info.inc
 Illegal bombplate id specified. Possible hack attempt. See watchdog.
01160101 Main - account_forms - account_forms.admin.inc
 Illegal bombplate id specified. Possible hack attempt. See watchdog.