NtGdiGetTextExtentExW: Assertion 'BitNumber < BitMapHeader->SizeOfBitMap'

Created an attachment (id=5563)
DebugLog

Using trunk revision 50047, VirtualBox 3.2.12, no Guests Additions installed

How to reproduce the issue:

1) Load Foxit Reader 4.3 (http://www.filehippo.com/download_foxit/)

2) Load a PDF file (i loaded a PDF stored on a iso image attached via
virtualbox)

3) Watch Foxit Reader hang, trying to lad the PDF

typing cont you can load the first page, but scrolling the pages hit the
assertion again

Here is the backtrace :

Assertion 'BitNumber < BitMapHeader->SizeOfBitMap' failed at lib\rtl\bitmap.c line 360
Entered debugger on embedded INT3 at 0x0008:0x808fce76.
kdb:> bt
Eip:
<ntoskrnl.exe:fce77 (lib\rtl\i386\debug_asm.S:32 (DbgBreakPoint))>
Frames:
<ntoskrnl.exe:108374 (lib/rtl/bitmap.c:360 (RtlTestBit@8))>
<ntoskrnl.exe:a5558 (ARM³::POOL:847 (MiFreePoolPages@4))>
<ntoskrnl.exe:9ab77 (ARM³::EXPOOL:889 (ExFreePoolWithTag@8))>
<win32k.sys:b3356 (subsystems/win32/win32k/objects/text.c:327 (NtGdiGetTextExtentExW@32))>
<win32k.sys:b35c2 (subsystems/win32/win32k/objects/text.c:428 (NtGdiGetTextExtent@20))>
<ntoskrnl.exe:72cf (ntoskrnl/ke/i386/traphdlr.c:1558 (@KiFastCallEntryHandler@8))>
<ntoskrnl.exe:f7453 (ntoskrnl\ke\i386\trap.s:135 (KiFastCallEntry))>
<ntdll.dll:7b31>
<Foxit Reader.exe:198a8>
<Foxit Reader.exe:58fb52>
<Foxit Reader.exe:58f823>
<Foxit Reader.exe:58e77a>
<Foxit Reader.exe:58e995>
<USER32.dll:49ab1>
<USER32.dll:49ebe>
<ntdll.dll:7a84>
<Foxit Reader.exe:594c5c>
<0000000f>
Couldn't access memory at 0x000D0240!
kdb:>

I reported earlier a similar bug, but the assertion is different.
The PDF opened is the same of bug http://www.reactos.org/bugzilla/show_bug.cgi?id=5782, but Foxit Reader's version is different