Startup issues after installing mountain lion

Since I updated to mountain lion two days ago I'm having issues starting my mac after system shut down. When I switch my mac on I get a black screen with what looks like DOS writing, it won't go to the login screen unless I hold down the power button till it shuts down then switch it on again then it will boot fine! I've tried repairing disk permissions but this has not helped.
Any ideas?? tried ringing apple but they're closed :-(

Hi Guys...
Sorry its taken me a fews day to get back, well as it stands the situation is still the same!
Heres what I've done so far:
reset the PRAM - no joy
reset the SMC - no joy
ran the disk repair in recovery - no joy
repaired disk permissions in recovery - no joy
reinstalled mountain lion - no joy
but I think I've narrowed down the problem from the log console, it would appear that my imac is automactially booting into single-user mode.... see below.
01/08/2012 12:03:00.706 com.apple.launchd[1]: *** launchd[1] has started up in single-user mode. ***
01/08/2012 12:03:00.709 com.apple.launchd[1]: *** Verbose boot, will log to /dev/console. ***
01/08/2012 12:03:00.712 com.apple.launchd[1]: *** Shutdown logging is enabled. ***
any ideas on how to rectify this would be great please...

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HT4718 About Lion Recovery issues after installing mountain lion

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Tx
Mario

Here's a working bootcamp hard drive ( OSX 10.7 & Windows 7 ):
MacBookAirs-MacBook-Air:~ macbookair$ sudo fdisk /dev/disk0
Disk: /dev/disk0          geometry: 30515/255/63 [490234752 sectors]
Signature: 0xAA55
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#: id cyl hd sec - cyl hd sec [     start -       size]
1: EE 1023 254 63 - 1023 254 63 [         1 -     409639] <Unknown ID>
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Does this mean my imac is dying? only had issues after installing mountain lion:

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<Personal Information Edited by Host>

There is one thing you can do to try to determine what's consuming that space. Launch a Terminal session, then type this command:
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Here are the things on my system that have a non-trivial amount of space:
975M /.Spotlight-V100
15G /Applications
17G /Library
5.8G /private
3.8G /System
37G /Users
606M /usr
For more details on a particular entry, just put its name after the slash on that command, such as
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Select: Music. (and Apps and Books) if you want.
Click OK.
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Hi Jeff,
Tried to reply with my iPhone but not easy! Anyway, back on the laptop now. Yes the crash was bad but Tek support at Prism Sound was really good. In the end I rebuilt the whole system on a new disk which took a couple of days with all the plugins, softsynths etc.... but there seemed to be no alternative in my case, and this was agreed with Prism sound as being the only alternative left to me. I still don't really know what caused the crash but ML and Orpheus are both working fine now. Let's face it, you'll have to update at sometime..maybe best to pick some time between projects On balance, I suspect that my problems were unique to my system and that your installation will go ok.
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Paul_31:
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HT1338 After install mountain lion my superdrive do not work

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I tried an NVRAM/PRAM reset. This did not fix the problem.
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https://discussions.apple.com/thread/4150905?start=30&tstart=0
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Uninstall Office and reinstall it
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rjliii wrote:
Solved problem with original Canon software. When I downloaded Canon software upgraded for OS X 10.8, I got all by Navigator Ex. Noticed that on Canon's site, the upgraded version is 3.1; my app was 2.1. Upgraded to 3.1 for Nav. Ex, and it works.
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I had the same problem and found the solution here:
https://discussions.apple.com/thread/3189272

Startup issues after installing mountain lion

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