What did the crash constitute of? A complete rebuild of your machine including sw reinstall or less drastic?
Did you have to rebuild your LR database, or are you making use of an existing one? Have you already tried updating the metadate in LR (IIRC, right click an image and choose update metadata). If that doesn't work, there's likely something wrong with your LR and/or PM setting. Can we see your PM XMP/IPTC preferences?
Also: do you have LR keep metadata only in its database or also update the xmp sidecar files?
Hope this helps,
Hayo