The paper concerns undirected and directed power graphs. LaTeX provides a neat way to distinguish: the command \vec puts an arrow above its argument. Unfortunately, when I put the paper into the Springer journal style file, I discovered that Springer have re-defined \vec to set its argument in bold type. (After all, who would typeset a vector in anything other than bold type?) So I submitted the final version as an unadorned LaTeX file, not in Springer style, and warned the typesetters about the problem. As I expected, they used something like \overrightarrow, which sets a huge clunky arrow destroying the nice spacing around the symbol.

Then, when the proofs came from the publishers, I found a document with one page of instructions, two pages of metadata, one blank page, and that was all: no actual proof of the article!

To be fair to the proof correction people in Chennai, when I told them about this they very quickly put the right document up, and the three of us checked it and found that no corrections were necessary. ]]>