I ordered my unit sometime around 5/5/11. I had no time or opportunity to actually use it - until now. I updated software (sys, app, fpga) yesterday - following Quad wiki and went up to the latest official versions - everything seems working perfect. Today I decided to try your logic analyzer. I have now tried holding button 4 according to your instructions - nothing happened, no message and no memory.dmp after rebooting to App1 and connecting to PC as USB drive.
One (maybe) interesting thing - when booting to your App3, there appears to be tiny display artifact - something what seems like 1 red pixel (looks like dead pixel on some unperfect LCD screens). This red dot is located at the very bottom line and horizontally it is located somewhere below most right pixel of character ‘a’ in “…2012 jpa”. When I keep holding button 3 there is no red dot, but ~0.5s after releasing it it shows. I can provide photos if needed.