I have a user who is using IE6 SP3, he is in the same office with me, so no network difference.
When he clicked on a component in Gemini project, the page just turns blank.  He got login page ok, logged in ok, opened a project home page ok.  Click "Open issue", never finished loading, blank page. 

I am seeing a lot of these errors in the system log.  However, don't see the log at the last time that we reproduced the problem together 4:29pm 9/25/2009.

No Page.Request.UrlReferrer detected : /gemini/issue/ViewIssue.aspx9/25/2009 4:21:28 PM   No Page.Request.UrlReferrer detected : /gemini/issue/Issue.aspx9/25/2009 4:06:49 PM   No Page.Request.UrlReferrer detected : /gemini/issue/ViewIssue.aspx9/25/2009 3:55:18 PM   No Page.Request.UrlReferrer detected : /gemini/issue/Issue.aspx9/25/2009 12:34:32 PM   No Page.Request.UrlReferrer detected : /gemini/issue/Issue.aspx9/25/2009 10:54:10 AM   No Page.Request.UrlReferrer detected : /gemini/issue/ViewIssue.aspx9/25/2009 9:49:08 AM   No Page.Request.UrlReferrer detected : /gemini/issue/ViewIssue.aspx9/25/2009 9:19:59 AM   No Page.Request.UrlReferrer detected : /gemini/issue/ViewIssue.aspx9/24/2009 4:57:34 PM   No Page.Request.UrlReferrer detected : /gemini/issue/ViewIssue.aspx9/24/2009 2:14:29 PM   No Page.Request.UrlReferrer detected : /gemini/issue/ViewIssue.aspx9/24/2009 2:12:31 PM   No Page.Request.UrlReferrer detected : /gemini/issue/ViewIssue.aspx9/24/2009 2:12:30 PM   No Page.Request.UrlReferrer detected : /gemini/issue/ViewIssue.aspx9/24/2009 2:11:27 PM   No Page.Request.UrlReferrer detected : /gemini/issue/ViewIssue.aspx9/24/2009 2:09:20 PM   No Page.Request.UrlReferrer detected : /gemini/issue/ViewIssue.aspx9/24/2009 1:43:58 PM   No Page.Request.UrlReferrer detected : /gemini/issue/ViewIssue.aspx9/24/2009 12:37:10 PM   No Page.Request.UrlReferrer detected : /gemini/issue/ViewIssue.aspx9/24/2009 11:27:43 AM   No Page.Request.UrlReferrer detected : /gemini/issue/ViewIssue.aspx9/24/2009 10:44:00 AM   No Page.Request.UrlReferrer detected : /gemini/issue/ViewIssue.aspx9/24/2009 8:35:38 AM   No Page.Request.UrlReferrer detected : /gemini/issue/ViewIssue.aspx9/24/2009 7:01:00 AM   No Page.Request.UrlReferrer detected : /gemini/issue/ViewIssue.aspx9/23/2009 5:03:28 PM   No Page.Request.UrlReferrer detected : /gemini/issue/ViewIssue.aspx9/23/2009 5:02:27 PM   No Page.Request.UrlReferrer detected : /gemini/issue/ViewIssue.aspx9/23/2009 4:47:26 PM   No Page.Request.UrlReferrer detected : /gemini/issue/ViewIssue.aspx9/23/2009 4:43:21 PM   No Page.Request.UrlReferrer detected : /gemini/issue/ViewIssue.aspx9/23/2009 4:20:07 PM   No Page.Request.UrlReferrer detected : /gemini/issue/ViewIssue.aspx9/23/2009 3:56:59 PM   SendToHome() invoked9/23/2009 3:50:51 PM   No Page.Request.UrlReferrer detected : /gemini/issue/ViewIssue.aspx9/23/2009 3:46:18 PM

I am seeing a lot of these repeatedly throughout the days in Application Event log on Gemini server:

Event Type:    Information
Event Source:    CounterSoft Gemini Scheduler
Event Category:    None
Event ID:    0
Date:        9/25/2009
Time:        4:08:13 PM
User:        N/A
Computer:    <hostname>
Description:
http://<IP>/Gemini/webservices
Configured to process Gemini email alerts.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
===================================

Event Type:    Information
Event Source:    Mailbox Processor
Event Category:    None
Event ID:    0
Date:        9/25/2009
Time:        4:08:46 PM
User:        N/A
Computer:   <hostname>
Description:
http://<IP>/Gemini/webservices
Mailbox Processor initialised for client http://<URL>/gemini/

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

========================================

Before those 2 event logs above, we see this error:

Event Type:    Error
Event Source:    CounterSoft Gemini Scheduler
Event Category:    None
Event ID:    0
Date:        9/25/2009
Time:        3:39:52 PM
User:        N/A
Computer:    SERV-SOURCECTRL
Description:
System.Web.Services - System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> NHibernate.StaleStateException: Unexpected row count: 0; expected: 1
   at CounterSoft.Gemini.DataProvider.x6d086850de24539d.xd61d20efaffcf0b5(Int32[] x3f0e9c9e00efe82b)
   at CounterSoft.Gemini.Business.x010a22fd1e2ead4c.x9782ffd1e7c6e1a6(Int32[] x457befa9fbd13ad7)
   at Gemini.Scheduler.DeleteIssueAlerts(Int32[] iAlerts)
   --- End of inner exception stack trace --- -    at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
   at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
   at SchedulerServices.DeleteIssueAlerts(Int32[] iAlerts)
   at CounterSoft.Gemini.Scheduler.EmailAlertsProcess.ProcessIssueAlerts()

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
===========

Event Type:    Error
Event Source:    CounterSoft Gemini Scheduler
Event Category:    None
Event ID:    0
Date:        9/25/2009
Time:        3:39:33 PM
User:        N/A
Computer:    SERV-SOURCECTRL
Description:
System.Web.Services - System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> NHibernate.StaleStateException: Unexpected row count: 0; expected: 1
   at CounterSoft.Gemini.DataProvider.x6d086850de24539d.xd61d20efaffcf0b5(Int32[] x3f0e9c9e00efe82b)
   at CounterSoft.Gemini.Business.x010a22fd1e2ead4c.x9782ffd1e7c6e1a6(Int32[] x457befa9fbd13ad7)
   at Gemini.Scheduler.DeleteIssueAlerts(Int32[] iAlerts)
   --- End of inner exception stack trace --- -    at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
   at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
   at SchedulerServices.DeleteIssueAlerts(Int32[] iAlerts)
   at CounterSoft.Gemini.Scheduler.EmailAlertsProcess.ProcessIssueAlerts()

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

============
Event Type:    Error
Event Source:    CounterSoft Gemini Scheduler
Event Category:    None
Event ID:    0
Date:        9/25/2009
Time:        3:36:28 PM
User:        N/A
Computer:    SERV-SOURCECTRL
Description:
System.Web.Services - System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> NHibernate.StaleStateException: Unexpected row count: 0; expected: 1
   at CounterSoft.Gemini.DataProvider.x6d086850de24539d.xd61d20efaffcf0b5(Int32[] x3f0e9c9e00efe82b)
   at CounterSoft.Gemini.Business.x010a22fd1e2ead4c.x9782ffd1e7c6e1a6(Int32[] x457befa9fbd13ad7)
   at Gemini.Scheduler.DeleteIssueAlerts(Int32[] iAlerts)
   --- End of inner exception stack trace --- -    at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
   at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
   at SchedulerServices.DeleteIssueAlerts(Int32[] iAlerts)
   at CounterSoft.Gemini.Scheduler.EmailAlertsProcess.ProcessIssueAlerts()

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.