The following error occurs on installation:
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Please wait while Setup installs Alfresco Enterprise on your computer.
Installing
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Error: There has been an error.
Error running su postgres -c '"/opt/alfresco-4.2.5/postgresql/bin/psql" -c
"ALTER USER postgres PASSWORD '\''****'\''" ' :
/opt/alfresco-4.2.5/postgresql/bin/psql.bin: error while loading shared
libraries: libreadline.so.5: cannot open shared object file: No such file or
directory
Press [Enter] to continue :
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Seems that documentation update should be done (to add instructions how to install the libreadline.so.5 library) or bitrock should be changed to install the required library automatically (if it is possible to do with bitrock).
On Ubuntu 12.04 machine I have installed libreadline5 packet with the following command:

sudo apt-get install libreadline5