Symptoms

When filling up an incorrect format of a value in a field of Quick Create Issue dialog, it does not throws any error in the dialog, rather it redirected to the page with the error like below when clicking the "Create" button.

https://<base_url>/secure/QuickCreateIssue.jspa?decorator=none

HTTP/1.1 400 Bad Request
Date: Thu, 30 Jan 2014 10:39:26 GMT
Vary: Accept-Encoding
Content-Encoding: gzip
Content-Length: 249
Connection: close
Content-Type: text/html; charset=iso-8859-1

Cause

The proxy in front of JIRA have ProxyErrorOverride parameter enabled when the default is off.

Resolution

1. Open the Proxy configuration file

2. Check if ProxyErrorOverride is enabled/on.

3. If it is enabled, set it to off.
4. Restart the Proxy(Apache) and try the operation again.