So I installed Ubuntu 12.04 with Wubi on my Windows 7 system. Everything worked just fine after some tries, the first tries at installing failed because I had a Ubuntu ISO file in my download folder which is where Wubi was.
When I now boot into Ubuntu, I can see 2 of my 4 partitions. The first is my C: drive, that is where I installed Wubi so I didn't really got surprised because that one wasn't there. But the other partition that didn't show up was my documents partition. I didn't do anything special with it, but it doesn't show up in Ubuntu. The wubidir file is in the documents partition as well as in all the other partitions.
How can I get the partitions to show up?
The partition is not showing up in GParted (at least not with name). There is one partition without name that has an warning sign on, but it is way too small for being the missing partition.
Here is a screen-shot:
And here is how it looks in Windows (EaseUs Partition master):