UPX unpacking seems bogus even for simple exe

Hello all,
I am developing extensions for Clamav (at least that's my objective!) and was doing some preliminary tests with UPX.
This is my test procedure:
1) compile a simple exe on windows + mingw with one main call function and no stdout: clean.exe
2)  upx clean.exe -o clean.upx.exe
3) run clamav and retrieve the unpacked file: 

LibClamAV debug: EntryPoint offset: 0x14d0 (5328)
LibClamAV debug: Bytecode executing hook id 259 (1 hooks)
LibClamAV debug: Bytecode: no logical signature matched, no bytecode executed
LibClamAV debug: UPX/FSG/MEW: empty section found - assuming compression
LibClamAV debug: UPX: Looks like a NRV2B decompression routine
LibClamAV debug: UPX: UPX1 seems skewed by 21 bytes
LibClamAV debug: UPX: PE structure rebuilt from compressed file
LibClamAV debug: UPX: Successfully decompressed
LibClamAV debug: UPX/FSG: Decompressed data saved in /var/tmp/clam/clamav-6707cc60ae0369dcc51b58d58af8bbdf

4) attempt to run the unpacked file getting a massive page fault (tested both on wine and windows non virtual machine) see output on email bottom.

My question: is this a normal behavior? I was kind of expecting a clean dumped file, because I have to do some static analysis on the dumped output.
I have put the test files on this share folder in case somebody wants to replicate my output:
https://www.dropbox.com/sh/uzvzilslhlop8jv/wyDr1qe8Y6



Clam version (installed from apt-get)
ClamAV 0.97.8/17955/Fri Oct 11 03:44:05 2013


Stack trace unpacked follows:

wine clean.unpacked.exe 
wine: Unhandled page fault on read access to 0x00006250 at address 0x6250 (thread 0009), starting debugger...
Unhandled exception: page fault on read access to 0x00006250 in 32-bit code (0x00006250).
Register dump:
 CS:0023 SS:002b DS:002b ES:002b FS:0063 GS:006b
 EIP:00006250 ESP:0060fe54 EBP:0060fe88 EFLAGS:00010212(  R- --  I   -A- - )
 EAX:00000000 EBX:7b894ff4 ECX:0060fef0 EDX:0060fef0
 ESI:7ffdf000 EDI:00401280
Stack dump:
0x0060fe54:  00401290 00000001 f7693a2e 00000000
0x0060fe64:  00000000 00000000 00000000 00000000
0x0060fe74:  7b859ddc 7ffdf000 7bc4bd4a 7b894ff4
0x0060fe84:  7ffdf000 0060fec8 7b85b04f 7ffdf000
0x0060fe94:  00401280 00000000 00000000 00000000
0x0060fea4:  00000000 00000000 00000000 00000000
000c: sel=0067 base=00000000 limit=00000000 16-bit r-x
Backtrace:
=>0 0x00006250 (0x0060fe88)
  1 0x7b85b04f in kernel32 (+0x4b04e) (0x0060fec8)
  2 0x7bc71d90 call_thread_func_wrapper+0xb() in ntdll (0x0060fed8)
  3 0x7bc7486d call_thread_func+0x7c() in ntdll (0x0060ffa8)
  4 0x7bc71d6e RtlRaiseException+0x21() in ntdll (0x0060ffc8)
  5 0x7bc49f4e call_dll_entry_point+0x61d() in ntdll (0x0060ffe8)
0x00006250: -- no code accessible --
Modules:
Module	Address			Debug info	Name (19 modules)
PE	  400000-  40d000	Deferred        clean.unpacked
ELF	7b800000-7ba29000	Dwarf           kernel32<elf>
  \-PE	7b810000-7ba29000	\               kernel32
ELF	7bc00000-7bcc3000	Dwarf           ntdll<elf>
  \-PE	7bc10000-7bcc3000	\               ntdll
ELF	7bf00000-7bf04000	Deferred        <wine-loader>
ELF	7ed47000-7ed66000	Deferred        libtinfo.so.5
ELF	7ed66000-7ed88000	Deferred        libncurses.so.5
ELF	7efa1000-7efbb000	Deferred        libnsl.so.1
ELF	7efbb000-7efe7000	Deferred        libm.so.6
ELF	7efe7000-7eff4000	Deferred        libnss_files.so.2
ELF	7eff4000-7f000000	Deferred        libnss_nis.so.2
ELF	f74a2000-f74ab000	Deferred        libnss_compat.so.2
ELF	f74ac000-f74b1000	Deferred        libdl.so.2
ELF	f74b1000-f765a000	Deferred        libc.so.6
ELF	f765b000-f7676000	Deferred        libpthread.so.0
ELF	f768f000-f77d1000	Dwarf           libwine.so.1
ELF	f77d3000-f77f5000	Deferred        ld-linux.so.2
ELF	f77f5000-f77f6000	Deferred        [vdso].so
Threads:
process  tid      prio (all id:s are in hex)
00000008 (D) Z:\home\epokh\Documents\Cyclomatic\clean.unpacked.exe
	00000009    0 <==
0000000e services.exe
	0000001f    0
	0000001e    0
	00000018    0
	00000017    0
	00000015    0
	00000010    0
	0000000f    0
00000012 winedevice.exe
	0000001c    0
	00000019    0
	00000014    0
	00000013    0
0000001a plugplay.exe
	00000020    0
	0000001d    0
	0000001b    0
00000021 explorer.exe
	00000022    0

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