Is the website that you are trying to access looks like the screenshot attached below ?? Its opening fine on my system using Win Xp & Firefox 10.

Perform the suggestions mentioned in the following articles:

• Clear Cookies & Cache
• Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems

Check and tell if its working.

May not be related to your problem but some of your Firefox Plugins are out-dated

• Update All your Firefox Plugins -> https://www.mozilla.org/en-US/plugincheck/
• When Downloading Plugins Update setup files, Remove Checkmark from Downloading other Optional Softwares with your Plugins (e.g. Toolbars, McAfee, Google Chrome, etc.)

Yes that is the site, the site opens fine and I can log in and the first page I land on after log in is fine too. However, if I try and go to any other page on the site I get the error message. The same thing is happening on another PC here at the office after Firefox update. I have updated plugins, cleared all history and cookies -cashe I also went through everything recommended on trouble shooting for different web problems for Firefox. It still won't open in Firefox. Explorer and chrome do open fine.

Here is the stack trace I get. Server Error in '/' Application. ________________________________________ Input string was not in a correct format. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.FormatException: Input string was not in a correct format.

Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[FormatException: Input string was not in a correct format.]

  System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) +7471479
  System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info) +119
  System.Convert.ToInt32(String value) +63
  Infragistics.WebUI.WebCombo.WebCombo.getRenderer() +170
  Infragistics.WebUI.WebCombo.WebCombo.get_Renderer() +19
  Infragistics.WebUI.WebCombo.WebCombo.Render(HtmlTextWriter output) +71
  System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
  System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
  System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
  System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +134
  System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19
  System.Web.UI.Control.Render(HtmlTextWriter writer) +10
  System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
  System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
  System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
  System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +134
  System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19
  System.Web.UI.WebControls.WebControl.RenderContents(HtmlTextWriter writer) +10
  System.Web.UI.WebControls.WebControl.Render(HtmlTextWriter writer) +32
  System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
  System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
  System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
  System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +134
  System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19
  System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) +163
  System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) +32
  System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output) +51
  System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
  System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
  System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) +40
  System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +134
  System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19
  System.Web.UI.Control.Render(HtmlTextWriter writer) +10
  System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
  System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
  System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
  System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +134
  System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19
  System.Web.UI.Page.Render(HtmlTextWriter writer) +29
  System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
  System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
  System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
  System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1266

________________________________________ Version Information: Microsoft .NET Framework Version:2.0.50727.3625; ASP.NET Version:2.0.50727.3618

Same problem here. Only happening with Firefox v.10. I have cleared cache, cookies, history, updated all plug-ins, still no luck.

Server Error in '/' Application. Input string was not in a correct format. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.FormatException: Input string was not in a correct format.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[FormatException: Input string was not in a correct format.]

  System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) +7467367
  System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info) +119
  System.Convert.ToInt32(String value) +63
  Infragistics.WebUI.UltraWebToolbar.UltraWebToolbar.getRenderer() +442
  Infragistics.WebUI.UltraWebToolbar.UltraWebToolbar.OnPreRender(EventArgs e) +112
  System.Web.UI.Control.PreRenderRecursiveInternal() +80
  System.Web.UI.Control.PreRenderRecursiveInternal() +171
  System.Web.UI.Control.PreRenderRecursiveInternal() +171
  System.Web.UI.Control.PreRenderRecursiveInternal() +171
  System.Web.UI.Control.PreRenderRecursiveInternal() +171
  System.Web.UI.Control.PreRenderRecursiveInternal() +171
  System.Web.UI.Control.PreRenderRecursiveInternal() +171
  System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +842

• Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems

Check and tell if its working.

Hi, I have the same problem. Troubleshooting extensions and themes doesn't help. Any other ideas to solve this issue?

Ok, here is the solution: http://community.infragistics.com/forums/t/65047.aspx