The top comment says this:

"What the lawsuit is about is stopping an uncertified last-minute modification to roughly half the Ohio voting machines that we know of...counties that bought ES&S voting system gear. (They're also doing something in the Deibold counties but we don't know what yet. But we do have the ES&S contract saying what's up:

https://docs.google.com/file/d/0B6Fh3F6hufhDd0NuNDBwcmJYdkE [link appears to be broken, but I've checked it many times and I've copied it perfectly, advice welcome]

The TL;DR is like so...they want to add new code to every central tabulator (the main control system for each county's elections) to do better output (.CSV format so they can easily combine results from multiple counties). The problem is, they picked the wrongest way possible to go about it. They want to load new code on the central tabulator that would be able to flip votes around. They should have written a separate utility to do the data conversion on another system and leave the central tabulator data alone.

All of these voting systems are closed source, proprietary trade secret. We don't have access to the source code. There's a code review process at private laboratories. It's a crappy system but at least it's a security measure of some sort. This new code is completely untested by anybody outside of the voting system vendor (ES&S).

Which means, if they can pull this off, over 20 Ohio counties will no longer be democracies. They'll be ES&S-ocracies or somedamnthing.

What is being done here is illegal, unconstitutional and insane."