Open drawings with Greek filenames fails in Ubuntu

Hello,

I installed recently DraftSight V1R5.0 on my Ubuntu 12.04 machine. 

Unfortunately, DraftSight cannot open any drawings whose filename or path contains Greek characters.  Draftsight returns the message "Cannot open the specified drawing file. Verify that the file exists".

In the previous version of DraftSight V1R4.0 everything was working fine. 

Am I missing something here?  Is there any workaround to solve this?

Thanks in advance,

Vassilis