SVN: Error setting property 'log': Could not execute PROPPATCH

I got the same issue using English and Russian in one line in commit comments. After deleting and retyping the message only in one language (Russian) commit succeeded.

I had this issue in Versions, it seems that this issue is caused by using "rich text" in the commit message. Hope this makes the issue and solution a bit clearer.

In my case there were mergeinfo records referencing a directory that was long since deleted on the SVN.

I found another site that mentioned something about "single line comments." My commit message didn't have multiple lines, but it did have smart quotes that I copied and pasted from our bug tracking system. Here is the offending phrase:

“Ingredients”

When I took away the smart quotes, I was able to commit.