I'm used so much to Firefox now that I always remove IE with vLite, seeing as I don't want anything to do with it anymore, but keep the HTML engine nevertheless so I can use the IE tab extension just in case and to not break some applications that use it. However since 1.1 beta 2 everytime I use these things it keeps trying to save the webpages, opening a download window and then failing anyway. Here's my preset:

; vLite preset file

[Information]
Version = 1.1 beta 2 on 2.0.50727.312 Microsoft Windows NT 6.0.6000.0
Target = Windows Vista ULTIMATE 32-bit - 6.0.6000.16386 - English (United States) 

[Compatibility]
Author's recommended
Aero Glass

[Components]
;# Accessories #
Accessibility
Speech Support
System Information
Welcome Center
Windows Sidebar and Gadgets
Wordpad
;# Drivers #
Display adapters
Ethernet network adapters
Modems
Printers-Apollo
Printers-Brother
Printers-Citizen
Printers-Dell
Printers-Diconix
Printers-Epson
Printers-Fuji Xerox
Printers-Fujitsu
Printers-Gestetner
Printers-IBM
Printers-Infotec
Printers-Konica
Printers-Konica Minolta
Printers-Kyocera Mita
Printers-Lanier
Printers-Minolta
Printers-Minolta-QMS
Printers-NEC
Printers-NRG
Printers-Oce
Printers-Oki
Printers-Okidata
Printers-Olivetti
Printers-Panasonic
Printers-QMS
Printers-Ricoh
Printers-Savin
Printers-Seikosha
Printers-Sharp
Printers-Star
Printers-Tally
Printers-Tektronix
Printers-Wipro ePeripherals
QLogic Fibre Channel Adapter
;# Games #
Game Explorer
Inbox Games
Premium Inbox Games
;# Hardware Support #
Fax Support
Internet Small Computer System Interface (iSCSI)
Modem Support
Smartcards
Windows Mobile Device Center
Windows Portable Devices
;# Languages #
Japanese
Korean
Simplified Chinese
Traditional Chinese
;# Multimedia #
Media Center
Sample Pictures
Screensavers
SideShow
Sound Recorder
Wallpapers
Windows Calendar
Windows Media Samples
;# Network #
Connect to a Network Projector
File and printer sharing (Server)
Internet Explorer
Internet Information Services
MSN Installer
Remote Desktop and Assistance
Remote Desktop Client
Windows Collaboration
Windows Firewall
Windows Mail
;# Services #
Computer Browser
Diagnostics
Distributed Link Tracking Client
Error Reporting
Internet Connection Sharing (ICS)
Microsoft DFS Replication
Offline Files
Remote Registry
Secondary Logon
Volume Shadow Copy
Windows Remote Management
Windows Search
;# System #
Beep
BitLocker Drive Encryption
Disk Defragmenter
Help
Manual Install (Setup.exe)
Microsoft Agent
Natural Language
Parental Controls
Performance Counters
ReadyBoost
Reliability and Performance Monitor
Remote Differential Compression
Security Center
Sync Center
System Restore
Tablet PC
Windows Backup
Windows Defender
Windows Easy Transfer
Windows SAT (Performance Index)
Zip Folder

[Options]
UAC (User Account Control) = Disabled
Paging Executive = Disabled
Power scheme = High performance
Hibernation = Off
Show extensions for known file types = Yes

[Protection]

[Drivers]

[Unattended]
SpecRegional
AcceptEULA
SkipProductKey
SkipAutoActivation

[Hotfixes]
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB905866-v13-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB925902-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB929123-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB929399-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB929735-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB929916-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB930178-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB930857-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB931099-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB931213-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB931573-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB932471-v2-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB933360-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB933579-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB933729-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB933928-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB935280-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB935652-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB935807-v2-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB936021-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB936357-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB936782-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB936824-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB936825-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB937077-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB938123-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB938127-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB938194-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB938952-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB938979-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB939159-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB939653-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB941202-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB941229-v2-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB941600-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB941649-v2-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\Windows6.0-KB941651-x86.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\WUClient-SelfUpdate-ActiveX~7.0.6000.381.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\WUClient-SelfUpdate-Aux-TopLevel~7.0.6000.381.cab
F:\Downloads\Lite\hotfixes\Packages_through_WinUpdate_Nov\WUClient-SelfUpdate-Core-TopLevel~7.0.6000.381.cab
F:\Downloads\Lite\hotfixes\Extra_Packages\Windows6.0-KB932925-x86_Hold'Em_Poker_game.cab
F:\Downloads\Lite\hotfixes\Extra_Packages\Windows6.0-KB933713-x86_Dreamscene_RTM.cab

[LanguagePacks]

Is it something my end or in vLite's?

I tried the IETab on 1.1RC and it works fine, can you confirm?

I always have used Firefox (3.0b2 now) with IEtab and IE removed with vLite: no problem. Howeever I always set programaccess for standardprograms to Mozilla Firefox from within the control panel.