Ide to aj s ext2IFS, ale:
http://www.fs-driver.org/faq.html#acc_ext3
Tak si to v tom kubuntu dismountni alebo nejak dosiahni nech to vyprazdni jurnal a potom ti to pojde.The Ext2 file system driver of the Ext2 IFS software will refuse mounting an Ext3 file system which contains data in its journal, just like older Linux kernels which have no Ext3 support. In this way data loss and damaging the file system is avoided when the journal is subsequently replayed. So you can access only those Ext3 volumes with the Ext2 IFS software which have been cleanly dismounted beforehand.
P.S. ked mas problem tak pouzivaj google a studuj/citaj. Odpoved na tvoj problem som nasiel googlom za minutu, aj ked som o tom predtym nemal ani paru (kazdy sa cely zivot uci, a s googlom je to 1000x rychlejsie :)