Error 500 when log shows 200 (Rails)

[tuesmerde]

Hi, I've setup a Rails site that uses gems installed locally (specifically hpricot for HTML parsing and 'amazon-ecs' for searching products). The code works fine on my local machine and while most of the site runs smoothly, the search page always returns an error 500. After checking the log and file and directory permissions, using server-generated dispatch files, and making sure the database was responding correctly, I can't figure out why the development.log shows that the request produced a "200 OK" while I see a "500 Server Error" page. I've compared two development.log files...one from setup on the server and one from my local machine and they are reproduced below. Anyone have any ideas?? Thanks.

--> server
Processing BrowseController#general_search (for 128.12.176.38 at 2007-01-09 23:46:43) [POST]
Session ID: e5c4a28885b554d24002a052ae7a14dc
...(abbreviated here...does some DB inserts and queries)...
Rendered shared/_welcome (0.01797)
Rendered /shared/_search (0.71242)
Completed in 4.54218 (0 reqs/sec) | Rendering: 1.69148 (37%) | DB: 1.73674 (38%) | 200 OK

--> local machine
Processing BrowseController#general_search (for 127.0.0.1 at 2007-01-09 22:55:49) [POST]
Session ID: f34a6d7e37ab8874dd6b85af15ac725c
...(abbreviated here...does some DB inserts and queries)...
Rendered shared/_welcome (0.01000)
Rendered /shared/_search (0.00000)
Completed in 3.00500 (0 reqs/sec) | Rendering: 0.09000 (2%) | DB: 1.23200 (40%) | 200 OK [http://localhost/browse/general_search]