When a user tryes to "Create My Blog" we are receiving the following error in the event log.

ModuleId: 472
ModuleDefId: 107
FriendlyName: Create new Blog
ModuleControlSource: DesktopModules/Blog/EditBlog.ascx
AssemblyVersion: 05.00.00
PortalID: 0
PortalName: Moderator
UserID: 3
UserName: clientServices
ActiveTabID: 79
ActiveTabName: Blog
RawURL: /Blog/tabid/79/ctl/Edit_Blog/mid/472/BlogID/-1/Default.aspx
AbsoluteURL: /Default.aspx
AbsoluteURLReferrer: **************/Blog/tabid/79/ctl/Edit_Blog/mid/472/BlogID/-1/Default.aspx
UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2 (.NET CLR 3.5.30729)
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: 3517d214-d116-4d6b-8675-680263d829d7
InnerException: Object reference not set to an instance of an object.
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: DotNetNuke.Modules.Blog.EditBlog.UpdateBlog
StackTrace:
Message: DotNetNuke.Services.Exceptions.ModuleLoadException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at DotNetNuke.Modules.Blog.EditBlog.UpdateBlog() --- End of inner exception stack trace ---
Source:
Server Name: ***********

Any ideas on where the error is occuring?

I got the same error but as I have no languages installed, (no records in Languages table) I'm not sure this will work for me.  Any thoughts?

Many people are getting this same error. Theres another thread on it. It appears to be something related to 5.1.2 and Blog View module and the menu nav provider and CSS skin interaction changes in 5.1.2 that directly affect Blog module adversely. Does not occur in any version below or older than 5.1.2. The "fix" that was listed does not fix the error either. I tried numerous ways to get around it but could not. I am hoping that 5.1.4 has a fix in it but as of this point in time, cant use the Blog module on vers 5.1.2. I have seen someone say that 5.1.1 it does work but no consolation. The Blog module lead does not appear to have said anything related to any problem in DNN5.x at all. I looked on Bug Tracker and it is listed there as a bug as well as a 'Show Stopper' as it is pretty critical to existing sites that have a lot of Blog activity and all the rest of us too that like using the Blog module.