One user encountering problems during creation of objects - page not found

Question

Hi,
We have a new developer in the US (Apex host in Switzerland) who reports getting the "page not found" error or a frozen session, when trying to create a new table. It happens when using SQL in the command window or the GUI in object browser. There seem to be no issues with creating apps and app components, just db objects.
He's also reporting getting prompted for bind variables when running a simple create table statement containing no bind variables. Don't know if this is related.
He's tried from another workstation and had same problem there, while I've had no problem when doing same on his account, from another region.
He's disabled the proxy server and tried various browsers, with same result.
I found following in access and error logs which I think may be related. Not sure where to go from here and could use some advice.
Error log:
[Mon Apr 23 14:27:12 2007] [error] [client XXX.XXX.XXX.XXX] [ecid: 1177338311:XXX.XXX.XXX.XX:10078:0:24103,0] mod_plsql: /pls/apex/wwv_flow.show
HTTP-500 Error Reading Data from Client!!
Access log:
[23/Apr/2007:14:27:12 +0000] "POST /pls/apex/wwv_flow.show HTTP/1.1" 500 670
[23/Apr/2007:14:27:12 +0000] "GET /i/htmldb/misc/tabOffM.png HTTP/1.1" 200 215
[23/Apr/2007:14:27:12 +0000] "GET /i/htmldb/misc/tabOffM.png HTTP/1.1" 200 215
[23/Apr/2007:14:27:12 +0000] "GET /i/htmldb/misc/tabOnM.png HTTP/1.1" 200 216
[23/Apr/2007:14:27:12 +0000] "GET /i/htmldb/misc/tabOffM.png HTTP/1.1" 200 215
[23/Apr/2007:14:27:12 +0000] "GET /i/htmldb/builder/topnav2.gif HTTP/1.1" 200 91
[23/Apr/2007:14:27:12 +0000] "GET /i/htmldb/builder/tab_rounded.gif HTTP/1.1" 200 51
Thanks,
Michelle

Answer 1

Michelle,
1) What is the version of the database? What platform?
2) Connect as SYS via SQL*Plus - what is the result of "select owa_util.get_version from dual"?
3) Are you using Application Server?
4) Is this user going through SSL? Are you?
5) Have you isolated the HTTP-500 errors to this user?
Joel