Hi, 
With 641B, open the attached document. Once the graphic is shown, select it, 
right-click, select "graphics", and click on the tabs "graphic" and "crop".
You get an "unrecoverable error". 
It may have to do with the fact that the image (GIF) takes very long to load. 
If you click, for example, on the tab "graphic" and wait until the picture is 
shown in the preview area, then you can click on the other tabs at will and 
the "unrecoverable error" doesn't occur.

In one instance, I also got the following three messages (but this happened 
only once in a number of times I tried this):
SOFFICE caused an invalid page fault in
module SFX638MI.DLL at 015f:1d5f9479.
Registers:
EAX=0086ef48 CS=015f EIP=1d5f9479 EFLGS=00010202
EBX=00000001 SS=0167 ESP=0086ef38 EBP=00000001
ECX=0086ef48 DS=0167 ESI=01fb1eb8 FS=1d37
EDX=0000003e ES=0167 EDI=00000000 GS=0000
Bytes at CS:EIP:
8a 87 10 02 00 00 c7 44 24 30 01 00 00 00 84 c0 
Stack dump:
006427fe 01fb2118 00000001 00000000 1cb75358 01f23180 00000000 01fc67b0 
01fc6880 00860000 0086f05c 1d6a756e ffffffff 1d5f93be 01fb2118 1c69e8c8 

SOFFICE caused an invalid page fault in
module SW638MI.DLL at 015f:1e3721a3.
Registers:
EAX=1c85f6ec CS=015f EIP=1e3721a3 EFLGS=00010202
EBX=0086de68 SS=0167 ESP=0086ddc0 EBP=1c719920
ECX=00000000 DS=0167 ESI=00000000 FS=1d37
EDX=0072e5cc ES=0167 EDI=00b7bc74 GS=0000
Bytes at CS:EIP:
8b 46 4c 85 c0 75 15 6a 00 e8 7f 49 fe ff 8b 46 
Stack dump:
0071cf2c 1e0daaa9 00730000 1e0a563f 00b7bc74 007218b8 1e0a55ce 0071cfd8 
1c62020e 0071cf2c 0071cfd8 1c620046 00640cfc 0086de68 00860000 0086de4c 

SOFFICE caused an invalid page fault in
module SW638MI.DLL at 015f:1e351374.
Registers:
EAX=1c85f6ec CS=015f EIP=1e351374 EFLGS=00010202
EBX=00000000 SS=0167 ESP=0086d8e4 EBP=0086e8cc
ECX=0071bbf8 DS=0167 ESI=00000000 FS=1d37
EDX=00000003 ES=0167 EDI=0067d3f4 GS=0000
Bytes at CS:EIP:
8b 46 28 83 c6 28 83 c4 04 85 c0 0f 85 a5 00 00 
Stack dump:
0000002f 007330e8 00733100 00000004 0086e8cc 00000000 1d6415d5 1d608600 
0067d3f4 007330e8 1d608511 1d6ce1d8 00000000 0086e8c0 004014ca 007330e8 

Best regards, 
Simon.