"name" and "uid" parameters not accepted

I'm trying to use node_import under 4.6.0, having used ti extensively and with great success under 4.5.0. I have encountered a problem, in that I am unable to import successfully either the "name" or the "uid". As a result all my imports are labelled "Anonymous".

Under 4.5.0, I have always put "name" as the first item in the CSV list of fields. Under 4.6.0, with the same file the name appears not to be recognised, and the articles are listed under "Anonymous".

I then tried putting the "name" parameter elsewhere in the line and this time, although the name appears to be correct when I view the Preview, the import itself fails, creating a blank entry in the "node" table.

Here are two examples, one of which fails as above, the other of which works, but "loses" the user name.

title,type,body,promote,name,path
"L'Uci e la decadenza",book,"
Here is some test text
",0,joebloggs,rixxx/26_uci_deca.html

name,title,type,body,promote,path
joebloggs,"L'Uci e la decadenza",book,"
Here is some test text
",0,rixxx/26_uci_deca.html