I am trying to install ubuntu alongside my windows 7. The problem is that ubuntu is not detecting all of my partitions and basically clubs together many of them. The same thing is done by using GParted. However this problem does not arise while I am using Windows - 7.

I cant paste the image of GParted since I dont have the required reputation...

I think this could be due to stray GPT data but am not sure how to take care of it.

Can someone help me figure this out ? The output of fdisk -l is as follows

Disk /dev/sda: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x20000000

Device Boot      Start         End      Blocks   Id  System
/dev/sda1              63        2047         992+  42  SFS
/dev/sda2   *        2048      206847      102400   42  SFS
/dev/sda3          206848   146802687    73297920   42  SFS
/dev/sda4       146802688   625140399   239168856   42  SFS

However actually I have 4 partitions along with 25 gb unallocated space that I had thought to use for Ubuntu installation.