Logic still plagued by serious region start/end adjust and crossfade bugs

Wow... it had been a while since I used Logic for serious audio editing (I primarily use it for composing, and for virtual instruments/effects/mixing onstage)... what an amazingly frustrating experience.

I spent all day today using Logic to overdub album tracks, using autopunch extensively. The tracking went fairly smoothly, but the simple task of fine-tuning the edit points and crossfading turned into a nightmare:

1) The Region-Disappearing Bug: when there are two audio regions touching, and I extend the length of the left region over the right region (with "no overlap" set), sometimes this works just as at should. But sometimes the right region simply disappears. The solution is to use Undo, then try again... sometimes I had to move the transition point five or six times, with the right region disappearing every time, until suddenly it worked.

2) The Region-Jumping Bug: same scenario: two audio regions touching, but not overlapping. Extend one of the regions to move the transition point, and sometimes the right region jumps slightly in time (not a large amount, but enough that it's visible when zoomed-in... maybe 50 samples or so). Same solution: Undo, then try again (or use "Move audio to original record position," then try again). Same deal... sometimes I performed the same edit five or six times in a row before it suddenly and inexplicably worked.

3) The Crossfade-Doesn't-Work Bug: self-explanatory... sometimes, two regions simply won't crossfade... no explanation. Trying this over and over doesn't tend to solve the problem. When this happens, the only way I've found to solve the problem is to remove the surrounding crossfades (the fades on the other sides of the regions I'm trying to fade), then recreate all three crossfades. That usually works, although sometimes it takes several tries.

4) The Crossfade-Causes-Region-To-Disappear-Or-Jump Bug: this is a combination of crossfading and bugs #1 and #2 above... performing a crossfade sometimes causes the same problems as moving an edit point: the region to the right sometimes disappears or jumps around in time.

I really want to believe that Logic is ready to compete in the world of professional audio, but the occasional times that I've tried to use it for serious production work, I've been shocked by these editing bugs. I love writing in Logic, and it continues to work flawlessly running plug-ins live on stage, but my experience has ben that these audio editing bugs currently render it essentially useless for production work, especially when clients are watching...

Does anyone have any advice on how to avoid these bugs ? Is it possible that upgrading to OS 10.5 would solve any of these problems ? I've avoided upgrading so far because of the unfavorable reports posted on this forum.

Thanks for any advice!

James