debian-user-polish is almost dead at this point. When trying to search the web to see if other Polish users have encountered this recently, I only found two other posts from 2009 about Debian install hanging at 52% when running the partitioning program, one being a question and another more of a rant on why Linux will never go mainstream.
I haven't found any more recent reports. If someone wanted to help with this, I would suggest replicating the original reporter's setup as closely as possible in a virtual machine, and try running the lenny installer on it. If this reproduces the problem, then try to debug it and/or try a more recent installer. If it does not, then just close the bug.
