Gaim-0.73 brought a new logging format which uses directories. This caused some permission bugs. I lost some logs I'd rather have and so did a few friends of mine. They hadn't upgraded to Gaim-0.74 yet, because they didn't even realize that their conversations weren't being logged. After upgrading, they didn't think to change their permissions and just weren't sure why their logs weren't being updated.
I dunno if it's gonna be "fixed" or what the problem exactly is.