In Greenhopper, in the Planning View.

I click New card and get the New card window. This contains
Issue Type Priority
Summary
Version
Component
Task Size (custom field)
Assignee
Reporter.

I fill it in, including text in Summary, and get an error:

Summary: field is required.

The text has disappeared from Summary.

If I now fill in the Summary again, it accepts the card.

The same thing happens for every card.

I'm using Opera 10 on Windows XP SP3.

This seems to be Opera-specific - doesn't happen in Internet Explorer.

Here's the output from Environment when I attempted to submit through our JIRA (submission failed):

Base URL http://a10108:9009
System Date Wednesday, 28 Oct 2009
System Time 12:24:49 +0000
Current Working Directory C:\WINDOWS\system32
Java Version 1.6.0_11
Java Vendor Sun Microsystems Inc.
JVM Version 1.0
JVM Vendor Sun Microsystems Inc.
JVM Implementation Version 11.0-b16
Java Runtime Java(TM) SE Runtime Environment
Java VM Java HotSpot(TM) Server VM
User Name SYSTEM
User Timezone Europe/London
User Locale English (United Kingdom)
System Encoding Cp1252
Operating System Windows XP 5.1
OS Architecture x86
Application Server Container Apache Tomcat/5.5.28
Database type postgres72
Database JNDI address java:comp/env/jdbc/JiraDS
Database URL jdbc:postgresql://localhost:5434/jiradb
Database version 8.4.1
Database driver PostgreSQL Native Driver PostgreSQL 8.4 JDBC4 (build 701)
External user management OFF
Crowd integration OFF
JVM Input Arguments -Dcatalina.base=C:\Program Files\Atlassian\JIRA 4.0 -Dcatalina.home=C:\Program Files\Atlassian\JIRA 4.0 -Djava.endorsed.dirs=C:\Program Files\Atlassian\JIRA 4.0\common\endorsed -Dmail.mime.decodeparameters=true -Dorg.apache.jasper.runtime.BodyContentImpl.LIMIT_BUFFER=true -Djava.io.tmpdir=C:\Program Files\Atlassian\JIRA 4.0\temp -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djava.util.logging.config.file=C:\Program Files\Atlassian\JIRA 4.0\conf\logging.properties -XX:MaxPermSize=256m vfprintf -Xms128m -Xmx512m
Modified Files [Installation Type: Standalone] jira-application.properties, entityengine.xml
Removed Files [Installation Type: Standalone] There have been no removed files
Date Purchased 22/Apr/09
License Type JIRA Enterprise: Starter
User Limit 5 (5 currently active)
Maintenance Period End Date 22/Apr/10
Maintenance Status Supported
Support Entitlement Number (SEN) 807637
Uptime 13 days, 21 hours, 28 minutes, 17 seconds
Edition enterprise
Version 4.0
Build Number 466
Build Date Mon Sep 28 00:00:00 BST 2009
Atlassian Partner
Installation Type Standalone
Server ID AFZT-2I30-ZKHX-DKZP
Attachments Enabled false
Issue Voting Enabled false
Issue Watching Enabled true
Unassigned Issues Enabled true
SubTasks Enabled true
Issue Linking Enabled true
Time Tracking Enabled true
Time Tracking Hours Per Day 8
Time Tracking Days Per Week 5
Installed languages Catalan (Spain)
Chinese (China)
Chinese (Taiwan)
Czech (Czech Republic)
Danish (Denmark)
Dutch (Belgium)
English (UK)
English (United States)
French (France)
German (Germany)
German (Switzerland)
Hungarian (Hungary)
Italian (Italy)
Japanese (Japan)
Norwegian (Norway)
Polish (Poland)
Portuguese (Brazil)
Russian (Russia)
Slovak (Slovakia)
Spanish (Spain)
Turkish (Turkey)
Default language English (United Kingdom) - System Default
Database Statistics
Issues 267
Projects 6
Custom Fields 77
Workflows 14
Users 5
Groups 6
System Properties
awt.toolkit sun.awt.windows.WToolkit
catalina.base C:\Program Files\Atlassian\JIRA 4.0
catalina.home C:\Program Files\Atlassian\JIRA 4.0
catalina.useNaming true
common.loader ${catalina.home}/common/classes,${catalina.home}/common/i18n/.jar,${catalina.home}/common/endorsed/.jar,${catalina.home}/common/lib/*.jar
file.encoding.pkg sun.io
file.separator \
java.awt.graphicsenv sun.awt.Win32GraphicsEnvironment
java.awt.printerjob sun.awt.windows.WPrinterJob
java.class.version 50.0
java.endorsed.dirs C:\Program Files\Atlassian\JIRA 4.0\common\endorsed
java.ext.dirs C:\Program Files\Atlassian\JIRA 4.0\jre\lib\ext;C:\WINDOWS\Sun\Java\lib\ext
java.home C:\Program Files\Atlassian\JIRA 4.0\jre
java.io.tmpdir C:\Program Files\Atlassian\JIRA 4.0\temp
java.naming.factory.initial org.apache.naming.java.javaURLContextFactory
java.naming.factory.url.pkgs org.apache.naming
java.runtime.version 1.6.0_11-b03
java.specification.name Java Platform API Specification
java.specification.vendor Sun Microsystems Inc.
java.specification.version 1.6
java.util.logging.config.file C:\Program Files\Atlassian\JIRA 4.0\conf\logging.properties
java.util.logging.manager org.apache.juli.ClassLoaderLogManager
java.vendor.url http://java.sun.com/
java.vendor.url.bug http://java.sun.com/cgi-bin/bugreport.cgi
java.vm.info mixed mode
java.vm.specification.name Java Virtual Machine Specification
java.vm.vendor Sun Microsystems Inc.
line.separator
mail.mime.decodeparameters true
org.apache.jasper.runtime.BodyContentImpl.LIMIT_BUFFER true
package.access sun.,org.apache.catalina.,org.apache.coyote.,org.apache.tomcat.,org.apache.jasper.,sun.beans.
package.definition sun.,java.,org.apache.catalina.,org.apache.coyote.,org.apache.tomcat.,org.apache.jasper.
path.separator ;
server.loader ${catalina.home}/server/classes,${catalina.home}/server/lib/*.jar
shared.loader ${catalina.base}/shared/classes,${catalina.base}/shared/lib/*.jar
sun.arch.data.model 32
sun.cpu.endian little
sun.cpu.isalist pentium_pro+mmx pentium_pro pentium+mmx pentium i486 i386 i86
sun.desktop windows
sun.io.unicode.encoding UnicodeLittle
sun.jnu.encoding Cp1252
sun.management.compiler HotSpot Tiered Compilers
sun.os.patch.level Service Pack 3
tomcat.util.buf.StringCache.byte.enabled true
user.country GB
user.home C:\WINDOWS\system32\config\systemprofile
user.language en
user.variant
java.class.path C:\Program Files\Atlassian\JIRA 4.0\bin\bootstrap.jar
java.library.path C:\Program Files\Atlassian\JIRA 4.0\bin;
.;
C:\WINDOWS\Sun\Java\bin;
C:\WINDOWS\system32;
C:\WINDOWS;
c:\Program Files\VMware\VMware Workstation;
C:\Program Files\Microsoft Platform SDK\Bin;
c:\mentorgraphics\2005PADS\SDD_HOME\common\win32\bin;
c:\mentorgraphics\2005PADS\SDD_HOME\common\win32\lib;
C:\Program Files\Windows Resource Kits\Tools\;
C:\Perl\site\bin;
C:\Perl\bin;
C:\Program Files\Ant\bin;
C:\WINDOWS\system32;
C:\WINDOWS;
C:\WINDOWS\System32\Wbem;
C:\Program Files\Doxygen\bin;
C:\VXIpnp\WinNT\Bin;
C:\Program Files\Subversion;
C:\Program Files\TortoiseSVN\bin;
C:\WINDOWS\system32\WindowsPowerShell\v1.0;
;
C:\PROGRA~1\DISKEE~1\DISKEE~1\;
C:\Program Files\InstallAware\InstallAware 9
sun.boot.class.path C:\Program Files\Atlassian\JIRA 4.0\jre\lib\resources.jar;
C:\Program Files\Atlassian\JIRA 4.0\jre\lib\rt.jar;
C:\Program Files\Atlassian\JIRA 4.0\jre\lib\sunrsasign.jar;
C:\Program Files\Atlassian\JIRA 4.0\jre\lib\jsse.jar;
C:\Program Files\Atlassian\JIRA 4.0\jre\lib\jce.jar;
C:\Program Files\Atlassian\JIRA 4.0\jre\lib\charsets.jar;
C:\Program Files\Atlassian\JIRA 4.0\jre\classes
sun.boot.library.path C:\Program Files\Atlassian\JIRA 4.0\jre\bin
Trusted Applications
[No trusted applications have been configured.]

=======================
Here's the error text from the failed problem submission:
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The mail server could not send to the following address(es): jira-support@atlassian.com (see JIRA log for further details)

Please check that the email to address is correct and try again.

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• The Atlassian Team