I am the CIO for a $300M company. We have two ERPs in-house, one of which is a very profitable and widely used off-the-shelf system. Over our three years of use of said system, we have found a number of bugs. We find them, we report them, and they are dealt with (albeit a bit slowly). We'd fix them ourselves, but of course we have no access to the source (which is not the case with OpenERP).
Hurry...please point out an ERP which doesn't have bugs. You can't. It sucks you found one in OpenERP so quickly, but complaining about it without offering recreate instructions is useless to everyone.