Quassel IRC

Example:

 ͖̠̼̪̱̱͚̍̂̂͑W͓̙̯̫̃̀͟ͅï̟̤ͭ͒ͨ͂t̛͓̭̪ͨ̂̂̊̆ͬ͑͊̕h̢̖̳̫̩̃̎ͪ̉͂̓̀̾ͬo͉̪̹̣̪͎̳͎͗ͭ̃ͬ̒̄́̚ṳ̵̢̻̜̝͖̲̔̌̽͂ͫ͑͑ͯ̈t͇̜̹͕͇͈̫͇̔͋̂͌̄̀̆͞ ̵̠̞̳̞͖̯̺ͪͯ̅ͮ̈́̚̚͟o͕͙̾ͯ̀͟͜ṛ̨͕͕͈́ͬ̈̌͒͆̇͘d̦͑́̄eͣ̊̏ͪ̿̏҉̻͕́r̥͙̭̩̼͋͌ͯ̂̾͊.̡̧͇͉͎͙̖̙͇̻̇

If i (right/left)click on a channel containing these characters, Quassel crashes with the attached crash file. The same happens if I paste it in the text input (before hitting send).
The problem does not occur if I change the font to, say, Fixedsys. The problem occurs with the standard Monospace font.

Server running 0.6.2 on Ubuntu 10.04 with sqlite.
Client running 0.6.2 on Windows 7 x64.