nicotine causes GDM freeze, need to kill GDM via shft-ctl-f1

[Nati]

Binary package hint: yelp

when NICOTINE-PLUS is running, after a while the desktop freezes. Nothing can be done. I do SHIFT - CTL - F1 and kill the GDM.ORG, than the system returns to the GUI like it was just restarted.
I thing that this is caused when I added to Nicotine shared folders from the windows NTFS partition.
the Nicotine version is Nicotine+ 1.2.9.

ProblemType: Bug
Architecture: amd64
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/yelp
NonfreeKernelModules: nvidia
Package: yelp 2.25.1-0ubuntu5
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: yelp
Uname: Linux 2.6.28-15-generic x86_64