OK, this is a pretty serious issue I found with my mage. In fact, I cannot believe nobody noticed it (I was too lazy to read all this thread, but it is not in IJBall's summary at least). Perhaps it is because this issue is such a big uber super exploity thing that nobody wants it fixed?
OK, here it is:
It is possible to make the player turns go quicker compared to monster turns. Most easy way to see this is with pressing space bar.
This has all sorts of useful applications: The boreheads for example, are supposed to stun you 4 turns, but quickly tapping four times on space makes you lose just one turn (from the viewpoint of the boreheads at least). Interesting, if you press space slower, it makes you lose more turns.
Also, as a mage, I found it very useful to outrun a couple of monsters, jam space for 20 times to regain some mana and flame the monsters.
Strangely, this trick seems not to work when the enemy is using a ranged attack btw.
...[Glitch] found on linux 1.04 version. It'd be good if someone were to confirm them on other platforms.
OK, I tried to replicate this, on a Mac, with a Fighter character - no evidence that hitting the space bar multiple times quickly was doing anything.
However, I then tried it on a Mac with my new Mage character, and there I was maybe seeing evidence that it was working, at least to regenerate my Mana quicker than my Mage otherwise should have.
So, it maybe doesn't work with Fighters and ranged-attackers like Rangers. But this does seem to be an issue with Mages at least (and maybe Healers?...).
I'll add this to my 'bug fixes for v1.05' list at my next update of the list.