Special characters can sometimes cause a problem. The issue is with Microsoft Excel. The workaround is the following:
1) Open your .csv import file in Excel
2) Go to File -> Save As -> Unicode Text
3) Open the exported Unicode Text (*.txt) file with an advanced text editor like Notepad++ (http://notepad-plus-plus.org/download/v6.1.5.html)
4) Go to Search -> Replace and replace all tabulations with ";" or ","
5) Go to Encoding -> Convert to UTF-8 without BOM
6) Go to File -> Save As and type a filename ending with the ".csv" extension
7) Import the file into Lead Liaison
