[Closed] about:blank shows on NoScript

I use NoScript and Flashblock with my Firefox browser to help pages load a little faster, because I'm still stuck in the dark ages on 56k here. NoScript shows about:blank as one of the scripts trying to load on my homepage. Is this an indication of a virus?
Firefox is very slow changing from tab to tab. Excruciatingly slow at times. I do not notice any other slow downs or problems on the computer. I have up to date Avira anti virus, Norton firewall and Spybot. My OS is win2k pro. I will paste the hijack this log below. Any info on about:blank would be appreciated.

Thanks
Skychaser

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 9:35:19 PM, on 5/4/2009
Platform: Windows 2000 SP4 (WinNT 5.00.2195)
MSIE: Internet Explorer v5.00 SP4 (5.00.2920.0000)
Boot mode: Normal

Running processes:
C:\WINNT\System32\smss.exe
C:\WINNT\system32\winlogon.exe
C:\WINNT\system32\services.exe
C:\WINNT\system32\lsass.exe
C:\WINNT\system32\svchost.exe
C:\WINNT\system32\spoolsv.exe
C:\Program Files\Avira\AntiVir PersonalEdition Classic\sched.exe
C:\Program Files\Avira\AntiVir PersonalEdition Classic\avguard.exe
C:\WINNT\System32\svchost.exe
C:\Program Files\Norton Personal Firewall\NISUM.EXE
C:\WINNT\system32\regsvc.exe
C:\WINNT\system32\MSTask.exe
C:\Program Files\Norton Personal Firewall\SymProxySvc.exe
C:\WINNT\System32\WBEM\WinMgmt.exe
C:\WINNT\system32\svchost.exe
C:\Program Files\Norton Personal Firewall\NISSERV.EXE
C:\WINNT\Explorer.EXE
C:\Program Files\Norton Personal Firewall\IAMAPP.EXE
C:\Program Files\Avira\AntiVir PersonalEdition Classic\avgnt.exe
C:\Program Files\Norton Personal Firewall\ATRACK.EXE
C:\Program Files\No-IP\DUC20.exe
C:\northernlights-copy-1-10-2008\SlavaNap.exe
C:\Program Files\Kitco\Kcast\Kcast.exe
C:\TekNap-13g\TekNap.exe
D:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://www.yahoo.com/
O2 - BHO: WormRadar.com IESiteBlocker.NavFilter - {3CA2F312-6F6E-4B53-A66E-4E65E497C8C0} - C:\Program Files\AVG\AVG8\avgssie.dll (file missing)
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O3 - Toolbar: @msdxmLC.dll,-1@1033,&Radio - {8E718888-423F-11D2-876E-00A0C9082467} - C:\WINNT\System32\msdxm.ocx
O4 - HKLM\..\Run: [Synchronization Manager] mobsync.exe /logon
O4 - HKLM\..\Run: [iamapp] C:\Program Files\Norton Personal Firewall\IAMAPP.EXE
O4 - HKLM\..\Run: [avgnt] "C:\Program Files\Avira\AntiVir PersonalEdition Classic\avgnt.exe" /min
O4 - HKCU\..\Run: [KITCO] C:\Program Files\Kitco\Kcast\Kcast
O4 - HKUS\.DEFAULT\..\RunOnce: [^SetupICWDesktop] C:\Program Files\Internet Explorer\Connection Wizard\icwconn1.exe /desktop (User 'Default user')
O8 - Extra context menu item: &NeoTrace It! - C:\PROGRA~1\NEOTRA~1\NTXcontext.htm
O9 - Extra button: Related - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINNT\web\related.htm
O9 - Extra 'Tools' menuitem: Show &Related Links - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINNT\web\related.htm
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra 'Tools' menuitem: Spybot - Search & Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra button: NeoTrace It! - {9885224C-1217-4c5f-83C2-00002E6CEF2B} - C:\PROGRA~1\NEOTRA~1\NTXtoolbar.htm (HKCU)
O16 - DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} (WUWebControl Class) - http://update.microsoft.com/windowsupdate/…b?1238570387213
O17 - HKLM\System\CCS\Services\Tcpip\..\{97936A83-B230-4ABC-850A-5197F38C5163}: NameServer = 64.136.173.5 64.136.164.77
O23 - Service: Avira AntiVir Personal - Free Antivirus Scheduler (AntiVirScheduler) - Avira GmbH - C:\Program Files\Avira\AntiVir PersonalEdition Classic\sched.exe
O23 - Service: Avira AntiVir Personal - Free Antivirus Guard (AntiVirService) - Avira GmbH - C:\Program Files\Avira\AntiVir PersonalEdition Classic\avguard.exe
O23 - Service: Logical Disk Manager Administrative Service (dmadmin) - VERITAS Software Corp. - C:\WINNT\System32\dmadmin.exe
O23 - Service: Norton Personal Firewall Service (NISSERV) - Symantec Corporation - C:\Program Files\Norton Personal Firewall\NISSERV.EXE
O23 - Service: Norton Personal Firewall Accounts Manager (NISUM) - Symantec Corporation - C:\Program Files\Norton Personal Firewall\NISUM.EXE
O23 - Service: Norton Personal Firewall Proxy Service (SymProxySvc) - Symantec Corporation - C:\Program Files\Norton Personal Firewall\SymProxySvc.exe

–
End of file - 4105 bytes

1.9
http://noscript.net/faq#qa1_9

Q: Why can I sometimes see about:blank and/or wyciwyg: entries in my NoScript menu? What scripts are causing this?
A: about:blank is the common URL designating empty (newly created) web documents.
A script can "live" there only if it has been injected (with document.write() or DOM manipulation, for instance) by another script which must have its own permissions to run.
It usually happens when a master page creates (or statically contains) an empty sub-frame (automatically addressed as about:blank) and then populates it using scripting.
Hence, if the master page is not allowed, no script can be placed inside the about:blank empty page and its "allowed" privileges will be void.
Given the above, risks in keeping about:blank allowed should be very low, if any.
Moreover, some Firefox extensions need it to be allowed for scripting in order to work.
Sometimes, especially on partially allowed sites, you may see also a wyciwyg: entry. It stands for "What You Cache Is What You Get", and identifies pages whose content is generated by JavaScript code through functions like document.write(). If you can see such an entry, you already allowed the script generating it, hence the above about:blank trust discussion applies to this situation as well.

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