For you guys, and ANYONE ELSE HAVING A PROBLEM SAVING. I'm hoping people will see this.
What happened is this: Eek released a broken version of 0.8.1 (i.e the version with the save problem). They realized, acknowledged and addressed this issue quickly, updating the download link to a new version. HOWEVER: the downloads of 0.8.1 that are floating around unofficial channels are all from this period where the download was broken, before the link was updated with a fixed release. So, unless you can find someone with the privileges necessary to download the fixed version, there is no way around this bug. HOWEVER: the next beta release is scheduled for later this week, so the problem is going to become moot very quickly anyway.
In short: the save bug in 0.8.1 is going to stay unless someone can get their hands on a 0.8.1 download that was released after the fix, but a new version is coming out this week (Thursday, probably) so it won't be a problem for much longer.