I finally found the “Hang on LJ Transaction” bug in the AliveJournal code. There is a class ResponseBlockManager that does a really good job of busting the server responses into a hashtable-like gizzer. The class was written by the original author, and is super-useful. Unfortunately there was an assumption in there that would occasionally cause a buffer to get scrogged.
Anyway, I am positive that the “Hang on Login” and the “Writer doesn’t clear after submission” bugs are now squashed…. I am going to package up a fixed version now.. (I also made the “Clear” button actually do something in the WriterWIndow… :P