Today I ran into the problem described here after starting a PMA configuration (v 3.3.4) from scratch using the included setup:
https://sourceforge.net/tracker/?func=detail&atid=377408&aid=2883381&group_id=23067
I noticed that setup suggests entering a value like you would usually do in php.ini. "32M" is given as an example. However, the field in which the value needs to be entered seems to filter out anything non-numeric characters which makes it impossible to enter "32M" or anything else ending in K, G, etc. The setup automatically makes it "32" without the "M" which could result in problems running phpMyAdmin as described in the thread I mentioned.
I found this on a freshly downloaded phpMyAdmin-3.3.4-all-languages. No old configuration was used, I started from scratch and did all changes in the setup.
I'm using the most recent FF (3.6.6) on Windows 7 64-bit by the way.
This bug was fixed in repository and will be part of a future release; thanks for reporting.
Thanks!