The latest github sources don't compile on Linux (Ubuntu 64 bits):
The compiler is right, these need to be either uint64 or uint64_t on both sides. I've patched wallet.h and wallet.cpp to make them uint64_t and it compiles and runs fine so far, but you should fix the sources. 
Code:
src/qt/bitcoingui.cpp: In member function ?void BitcoinGUI::updateMintingIcon()?:
src/qt/bitcoingui.cpp:942:82: error: no matching function for call to ?CWallet::GetStakeWeight(CWallet&, uint64_t&, uint64_t&, uint64_t&)?
pwalletMain->GetStakeWeight(*pwalletMain, nMinWeight, nMaxWeight, nWeight);
^
src/qt/bitcoingui.cpp:942:82: note: candidate is:
In file included from src/qt/bitcoingui.cpp:28:0:
src/wallet.h:181:10: note: bool CWallet::GetStakeWeight(const CKeyStore&, uint64&, uint64&, uint64&)
bool GetStakeWeight(const CKeyStore& keystore, uint64& nMinWeight, uint64& nMaxWeight, uint64& nWeight);
^
src/wallet.h:181:10: note: no known conversion for argument 2 from ?uint64_t {aka long unsigned int}? to ?uint64& {aka long long unsigned int&}?
make: *** [build/bitcoingui.o] Error 1
Odd, we compiled it on Ubuntu and Debian 64 with no errors, we'll look into it now.
