The importer is really broke.
I've just ried to import a file in "SoF - rtf" format file, and it failed.
Yet again calling up this ficticious user "raoul's" my documents folder.
We do not need both, a bug report in the forum and on launchpad . So please do not do cross posting/reporting! As written in the FAQ , launchpad, is the preferred place to report them. (And as you have a launchpad account, please file them their only.)
And please add more information to the reports. Particular how to reproduce the bug. In this case, it is good to know, if this happens with all songs, or just with a few. Are the songs (whose import fails) written in English?. A very good report is for example: 
The developers are doing this all for free, they don't receive any money for this, so "Oh dear, The importer is really broke." does not help very much. It sound's as if you were blaming them. I don't say you are attempting to blame someone, but it does sound like it.