I was using Windows 7 and I installed Ubuntu on it without an error then I installed Windows 8 and used installed Ubuntu for some time. When I decided to install Ubuntu (12. 04 version) on my pc again I faced this error "ubi-partman crashed".
"ubi-partman failed with exit code 141. Further information may be found in /var/log/syslog. Do you want to try running this step again before continuing? If you do not, your installation may fail entirely or may be broken. "
After that I tried to install it on my dell inspiron laptop that runs Windows 8 and I have the same problem. But I was really amazed when I installed it on my hp probook 4530s that has Windows 7 and I didn't see that error anymore.
Note that this error didn't appear when I tried to install Ubuntu 12. 10 but I need to install Ubuntu 12. 04 for some reasons. Another thing is that error shows up in installation and before partition choosing list.