SuBDivisions - We have looked into this and will be fixing this in the next release, but for the time being I have a potential solution for you. When there are too many columns in the invoice being displayed invoices are being printed in landscape. You have control over displaying some of these columns in the Options. Open up options and select Invoice Layout->Content. Here are the options for what is displayed on an invoice. The Three items you want to look at are:
[ ] Show Item Code column
[ ] Show Discount column
[ ] Show sales tax rate as column on invoice
Unless you are in the UK you can almost without a doubt turn that last one off. It's required for some businesses in the UK with VAT taxes. The other two are up to you and what you want to display. Most likely you can turn of the discount column as well. If you apply a discount directly from the invoice creation screen it will display, but turning it on here means that column will always display even if there is no discount.
Hope this helps.