Testing with YaxJournal 1.0.5
This client makes you download all your journal entries. You post by "Synchronizing with LJ".
To edit previous entries, you have to pull it into the "Preview" area by choosing the range in the Previous Entries Picklist and then double-click on the entry to bring it into the edit area.
The Previous Entries Picklist shows the cardinal ranges of entries(!!), which doesn't make a whole lot of sense. How would I know what number my entries are?! I'd find it much faster if it were shown by date ranges.
I'm also fairly uneasy about the synchronization. I update my journal from different places, I guess I'll have to do a sync just before I want to update, just to be sure I have the latest. Then sync again to post. Sounds like a bit of a pain.
[Update - 1211h]
Huh, I installed this the same way as iJournal, but iJournal didn't work and this one did. So, maybe I wasn't doing anything wrong with iJournal. I didn't think it was supposed to be that hard, Macs were meant to be easy...