Add a way to shift edge labels.
Also, make sure that edge labels are properly positioned for curved edges.
The development of igraph has moved to github, so please do not comment on this bug here. You are of course welcome to comment on github, here: https://github.com/igraph/igraph/issues/181
Bug watches keep track of this bug in other bug trackers.
Also, make sure that edge labels are properly positioned for curved edges.