I'm new here, and I'm gonna ask a question that seems to come up a lot, but I haven't been able to find a solution to

I'm running inkscape 0.48.5 r10040 in Windows 7. My computer has 8 gigs of RAM.
The issue I'm running into is: I have an svg file I'm attempting to save as a pdf. When I go to save it as a pdf, the program crashes with the message "Inkscape has encountered an internal error and will close now". The pdf that it creates is empty and can't be opened. I've tried vacuuming, but still no luck.
Obviously I'd like to be able to save this thing as a pdf, and I'm trying to figure out how.
I've been reading some responses to this question and it seems like this might be a memory issue, and I've tried saving smaller files to pdf and it's worked, but I guess I'm a little surprised because the size of the file versus the amount of RAM doesn't seem to add up - my file's (only?) 2.74 MB - do you think that could be enough to trigger a crash?
On a related note - when I've tried saving this with GIMP and some online file converting sites, the images within it tend to disappear or degrade into really rough pixellated versions of themselves. Inkscape has had issues with some of the pictures red-boxing when copied, a problem I thought I'd resolved by re-sizing the images in paint, but I'm wondering if this is related to the size issue as well? These objects look perfectly fine in the svg file when I'm looking at it in inkscape, but anywhere else they seem to degrade.
Any guidance or suggestions of alternatives on this would be appreciated, thanks in advance!