I've looked into the issue and see that the code already chip of the end part that begins with a bracket. So it should actually be just fine the way it is. Do you titles contain brackets middle in the title with parts of the title following the first bracket? If so, the code will cut off to much of the title and a lyric will not be found. When a title contains a bracket I'm sure that 98% percent of the times the bracket is not part of the title but rather an extension like e.g. "titleblahblah [remix]" or "titleblahblah [live]". Therefore the few titles containing a bracket will most likely not be recognized by the plugin.
About skipping: I use MP 1.1.0.0 SVN24553 but I experienced this issue earlier too.
I just installed the latest SVN and when I select Lyrics, MP quits at once
But I think I have found something: when TRACK tag exists in ID3, everything is fine.
But when no track tag, my issue appears.