2 potential bugs, 1 report. Hope that's OK.
User: 1 (full privileges)
Node Imprt 6.x-1.0-rc4
Node Reference Create (noderefcreate) 6.x-1.0
1) Strange behavior with node reference create
Have a Person content type with an "Institutional Affiliation" field that references an Institution content type. I created all of the Institutions before doing the import, the names all match 100%. When this Institutional Affiliation was set to Type: "Autocomplete text field with create" (using Node Reference Create module), Node Import created a new Institution for each person (with names "7" or "8" or "4", strangley enough) instead of referencing the original institutions.
Workaround: Change Node references type to select list before importing. Change back after the import.
2) Problems importing node references with similar names
Have two institutions: University of Michigan and University of Michigan Biological Station. Node references to "University of Michigan" work fine, node references to "University of Michigan Biological Station" fail and produce this error: "Institutional Affiliation: this post can't be referenced."
Workaround: Change the Institution name from "University of Michigan Biological Station" to "UMBS University of Michigan Biological Station" - and reflect this in my csv import - everything works fine.
Thanks for your work on this module.