Apt-get problems

[squareyes]

Hi all, 
I have just installed Dapper, looks very nice, but am having problems
with apt-get
Pretty much everything I try to install gives error messages

squareyes at here:~$ sudo apt-get install bluefish
Reading package lists... Done
Building dependency tree... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.

Since you only requested a single operation it is extremely likely that
the package is simply not installable and a bug report against
that package should be filed.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
  bluefish: Depends: libpcre3 (>= 4.5) but it is not installable
E: Broken packages
My sources list is the same as when I had Breezy running, but with
Breezy replaced with Dapper

## Uncomment the following two lines to fetch updated software from the
network
 deb-src http://au.archive.ubuntu.com/ubuntu dapper main restricted

## Uncomment the following two lines to fetch major bug fix updates
produced
## after the final release of the distribution.
 deb http://au.archive.ubuntu.com/ubuntu dapper-updates main restricted
 deb-src http://au.archive.ubuntu.com/ubuntu dapper-updates main
restricted

## Uncomment the following two lines to add software from the 'universe'
## repository.
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the
Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as
to
## your rights to use the software. Also, please note that software in
## universe WILL NOT receive any review or updates from the Ubuntu
security
## team.
deb http://au.archive.ubuntu.com/ubuntu dapper universe main restricted
multiverse
deb-src http://au.archive.ubuntu.com/ubuntu dapper universe

## Uncomment the following two lines to add software from the
'backports'
## repository.
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it
includes
## newer versions of some applications which may provide useful
features.
## Also, please note that software in backports WILL NOT receive any
review
## or updates from the Ubuntu security team.
#deb http://au.archive.ubuntu.com/ubuntu dapper-backports main
restricted universe multiverse
#deb-src http://au.archive.ubuntu.com/ubuntu dapper-backports main
restricted universe multiverse

deb http://security.ubuntu.com/ubuntu dapper-security main restricted
deb-src http://security.ubuntu.com/ubuntu dapper-security main
restricted

deb http://security.ubuntu.com/ubuntu dapper-security universe
deb-src http://security.ubuntu.com/ubuntu dapper-security universe

Does anyone have any idea what I may have ruined? 
When I updated the sources with apt-get I had some error messages re 
bzip2: Data integrity error when decompressing.
        Input file = (stdin), output file = (stdout)

It is possible that the compressed file(s) have become corrupted.
You can use the -tvv option to test integrity of such files.

You can use the `bzip2recover' program to attempt to recover
data from undamaged sections of corrupted files.

Err http://au.archive.ubuntu.com dapper/main Packages
  Sub-process bzip2 returned an error code (2)
Thanks in advance, sorry so long winded.
Take Care
Winton