Yes. IBANs are very long, bank account numbers. LedgerSMB has no problems storing, retrieving and using these without any issue.
Yes. SEPA (Single Euro Payments Area) requires support for very long bank account numbers (IBANs or International Bank Account Numbers). LedgerSMB can store and use these numbers without problems.
Assuming you have followed the How Do I Backup My Data instructions, you can restore your database as follows...
1) Restore the roles
$ psql -h [database host] -U [database admin user] < [roles backup file]
$ psql -h localhost -U lsmb_dbadmin < lsmb-roles.sqlc
2) Create a new database to restore into
$ psql -h [database host] -U [database admin user] -c 'CREATE DATABASE [new company name]'
The answer to this question depends on what using means to you.
As a user of the web application, yes, there should be absolutely no problem using a recent (as in: no more than 2 or 3 years old) web browser in order to take advantage of all the features available.
The short answer is that TeX doesn't know how to deal with UTF-8 (or rather non-ASCII) characters. XeTeX has been designed to work around these limitations. The easiest way to generate PDFs is to install Xe(La)TeX and use the 'xedemo' templates - these templates have been 'ported' from LaTeX to XeLaTeX.
Distribution specific install instructions listed below.
Debian / Ubuntu
Install texlive-xetex that includes xelatex
Versions 1.5 and higher are under active development and are supported by the community.
End of life
If you're looking for help on how to use EOL-ed versions, please try mailing the users mailing list.
If you're looking for someone to create bugfixes, please check with one of the parties providing commercial support or for less urgent fixes LedgerSMB Issues
Version 1.4 has been declared end-fo-life on 2017-09-16. The last release in the series is 1.4.42. No further releases will be made by the community.
Version 1.3 has been declared end-of-life on 2015-12-23. The last release in the series is 1.3.47. No further releases will be made by the community.
LedgerSMB versions 1.0, 1.1 and 1.2 won't be maintained any further due to the fact that there are some known security issues which can't be fixed.
Perl is a high-level, general-purpose, interpreted, dynamic programming language. Perl was originally developed by Larry Wall in 1987 [ http://en.wikipedia.org/wiki/Perl ]
Perl 5 is a highly capable, feature-rich programming language with over 24 years of development.
In general: neither. The advice is to have the full source tree in /opt/ledgersmb/<version>.
[work in progess...]
The PDF and PS invoices are generated using a program called LaTeX which handles the layout and typesetting. The actual LaTeX files are creating using Template Toolkit with extensions for LaTeX. These extensions are in the Template::Latex package available from CPAN. The software then generates a LaTeX file which is then processed to create a PDF or PS.