fpdf problem?

I've been using fpdf to create pdf files for my site.  All has been well 
for over a year.  Suddenly I have a problem wherein IE 10 on W7 crashes 
when I try to print one of these pdfs created by my php scripts.

The pdf files that I create seem fine.  If I bring one up in IE and then 
save it to my drive, I can then exit IE and go open the pdf and print it 
just fine.

I have removed my pdf printer drivers from my system and that hasn't 
improved my situation.  No luck there.

The exact scenario is:
- script generates pdf and opens it in a new target window;
- user clicks on print toolbar icon or File,Print;
- print dialog opens;  here I see some problems in that the (very 
complex) dialog is not displaying correctly with controls misaligned or 
overlaying other controls;
- click on Ok to execute the print to printer and nothing happens;  wait 
5 minutes and still nothing;
- NOW the problems begin;  when the window with the pdf in it is closed, 
in about 2 seconds I get a dialog box telling me IE has stopped working.

Note that the problem only occurs when I attempt to print.  If my script 
opens the pdf target window and I simply close it - no problems occur. 
BUT - if I actually open a print dialog I get a crash whether I click OK 
or Cancel, as soon as I close the window containing the pdf.

My question is does anyone have problems with fpdf lately?  Since my 
files seem to be completely normal to adobe reader I don't think their 
content is at fault.  It seems more like IE is not handling them and I 
can't find anything online about this.

I'm really hoping this is a problem wtih fpdf rather than IE since 
solutions are more apt to come out of this forum than the great wizards 
of M$ Oz.