if your still taking frame rate data , I had some pretty interesting results.
System Info:Operating SystemMicrosoft Windows XP Professional 32-bit SP3
CPUAMD Phenom II X4 955
Graphics1024MB ATI Radeon HD 4800 Series (ATI) RES:1280x1024
Game Build:Lastest from SVN running through eclipse.
FrameRates:If I start the game and let it idle, I get around 140-150fps .But, as soon as I mine the first rock, my fps drops to 100-110 and seems to remain there even after mining out most of the map. Also When the imps start digging, my fps will occasionally drop to 40s-50s for a second and jump right back to the 100s after they're done.
Other problems:I had a problem with the sound being over driven and distorted. after doing some searching, I found that it's a bug related to openal,lwjgl and certain sound drivers.
there are two ways I found to fix it
1:use an older version of the openal32.dll
2:create a ini file called "alsoft.ini" in %appdata% with the contents - {l Code}: {l Select All Code}
[general]
sample-type = int16
hope this helps some
-best regards, Brazen.