Computer Browsers on Workgroup Networks

Hi, I help maintain a network that currently operates as a Workgroup and has no PDC. The Router acts as a DHCP server. My question is the computers on the network report errors every now and again relating to the Master Browser Event ID 8021 & 8032. All these computers do connect ok to each other and to the internet. Do I ignore this error, or do I need to change the way the computers Master Browser election is done to stop these issues? Thanks in advance.