Install failed on acer 3000

[blitz_mohit]

I have a laptop (acer 3000) with the following configuration:
1.8GHz sempron processor
1.2Gb RAM
60 Gb hard disk
sis shared graphics memory
broadcom wireless network card(air force one)

i tried 3 times to install ubuntu 9.04 from the official disc with the following options
lanuage and keyboard--english
country--India
Time--Asia/Calcutta
partition--hda9 which has 13gb of space
mount point-/ and type--ext4

Device Boot Start End Blocks Id System
/dev/hda1 * 1 1380 11084818+ 7 HPFS/NTFS
/dev/hda2 1381 4057 21503002+ 1c Hidden W95 FAT32 (LBA)
/dev/hda3 4058 7207 25302375 5 Extended
/dev/hda5 4058 4069 96358+ 83 Linux
/dev/hda6 4070 4981 7325608+ 83 Linux
/dev/hda7 4982 5273 2345458+ 83 Linux
/dev/hda8 5274 5589 2538238+ 82 Linux swap / Solaris
/dev/hda9 5590 7207 12996553+ 83 Linux

the installer reaches installation correctly till 80% but after that it says ubiquity failed and tries to send error message but the compilation of that message also does not complete.

I have already a RHEL5 and winxp runnin on the same machine.Have been using ubuntu since 6.04 and never such a problem.
Is this a documented bug cause i couldnt find anythin...
:confused:

[mikewhatever]

Can you explain what the official disk is. Is that the disk with an iso file you downloaded and burnt? Did you md5sum checked the iso?

[blitz_mohit]

ordered from:::
Order a CD from ShipIt

Ubuntu offers the ShipIt service, which will deliver a small set of Ubuntu CDs to you at no cost. Follow the instructions on the ShipIt website to place an order - delivery will typically take 6-10 weeks.

what i got was an official disk..