• Newbie Tangled Revolution
I seemed to have gotten Revolution confused when two or more independent stacks were open; I managed to freeze it quite a few times in the first few weeks. Although this might have been before I learned the simple task of closing the stack and removing from memory, rather than just closing it... but even then, I've frozen it after a RR restart, then opening multiple stack tutorials, myspace stacks, etc and closing stacks properly. In future, I'd be working on the one stack/subs at a time so it won't be a problem, but as I said earlier, get these things out of my system early on...
Copy and paste between different object scripts or different stack scripts hasn't always worked (using GLX2) i.e won't allow me to paste, but this might have been due to the above, I guess, where I've managed to tangle Rev.
• A GLX2 Bug
If you have invisible objects on your card and then use View > Show Invisibles, it seems to freak out GLX2. The word Compile becomes garbage and a button labelled GLX2 Backscript appears. The GLX2 script editor becomes frozen; Rev's built-in script editor seems to work OK still though, so I'm pretty much certain the bug lives in GLX2. If anyone could confirm this, I guess its better to let Daniels & Mara know about this?
I guess I'll mention this as well; not a bug as such, more of a discrepency.
When resizing a player object and moving forward or back to another card, when going back to the card, the player reverts to its default size. Locking its size and position does the trick of course but then this is the only object that needs nailing down like this, if its size has changed from its default size. I'm not being petty here, just thought I'd point it out, honest!

• Annoyances and/or Niggles
There doesn't seem to be a right-across-the-board indent system in GLX2 for scripted lines, particularly noticeable in if...then...else statements. I got used to that in Lingo, and found the multi indenting system helpful to make scripts look clearer (and more elegant to the eye, I suppose). (I would add here though that I think GLX2 is excellent).
If a substack is opened and then closed without any change, a dialog box still sometimes appears asking if you want to save.
The asterisk and card number in the card/window bar. For the first few weeks of using RR, the asterisk annoyed me, mainly because I couldn't get rid of it even for test standalone apps. Then I worked out that if you name the label, the asterisk and card number no longer appear. So this was a niggle, but a niggle no longer, and I'm friends with the asterisk again...
OK, got those off my chest!

