I've just put my latest patch for BlogEngine on Mono up.
You'll find it on the newly created BlogEngine.NET Mono Patches page.
From your BlogEngine directory:
host:/opt/BlogEngine# patch -i /tmp/blogengine-11405.patch -p1
patching file BlogEngine.NET/App_Code/Controls/Blogroll.cs
patching file BlogEngine.NET/App_Code/Controls/MonthList.cs
patching file DotNetSlave.BusinessLogic/BlogEngine.Core.csproj
patching file DotNetSlave.BusinessLogic/Web/HttpHandlers/FileHandler.cs
patching file DotNetSlave.BusinessLogic/Web/HttpHandlers/ImageHandler.cs
host:/opt/BlogEngine#