Hi Michael,
to cite another author, "Don't panic!" :-)
It is quite difficult to actually lose data with Subversion, so your changes
and those of your wife are most likely still somewhere inside the "bit bucket
abbys" (aka a Subversion repository). It's just a question of how to get them
back.
Okay.. After receiving the latest upgrade to Subversion for Ubuntu from
Canonical, my wife and I have run across an odd behavior (bug?). As my
signature block betrays, we are indi authors, not coders. We're both
running Ubuntu 12.04lts, she on an Intel box, me on an AMD-64. Here's what
happened: