Hello, it appears that 'Trend Micro Worry-Free Business Security Services' is blocking your LibreOffice 4.1.1 download page, and rating it as "Dangerous" (see attached graphic). This may be due to some 'donate' code that seems to run, or perhaps some other reason. Your download site gets blocked in both Firefox (23) and Opera (12).
If you go to the Trend Micro site safety center ( http://global.sitesafety.trendmicro.com/ ), and enter the url " http://download.documentfoundation.org/libreoffice/stable/4.1.1/win/x86/LibreOffice_4.1.1_Win_x86.msi ", it will return a "Dangerous" rating, with the following explanation: "/The latest tests indicate that this URL contains malicious software or phishing./"
Just thought I'd pass this info along.
Regards,
Paul Hayward