Windows 7 Pro 32 bit
I created a simple Word document (text only). I opened it numerous times to edit. The document remained in tact. Today I opened it (and a few other documents) and all of the spacing between words was gone.
In the attached file I have reinserted the spacing in page 1 and 2. I left the remaining pages as I found them. I tried opening the file in Word 2013 and the same issue displays.