It crashes MESS! Sadly, it's one of the libraries that UPX damages when packing it - irreperably (unpacking with upx -d leaves the modified header and MESS still crashes)
Keep the normal, freshly compiled DLL in the archive, don't pack it.
hi there, dont know much about upx but i have had bad problems with compressing other files (especially lots jpegs in 1 archive), than i noticed that one ram module was defect. after changing the broken ram all went correct. maybe it will help.