Spotlight loses Adobe Lightroom library

Hi!

For some reason Spotlight loses Adobe Ligthroom library from its index from time to time

Spotlight searching for "Lightroom 4 Catalog" returns the backup libraries and a "ghost" item for the lost library.

Screenshots showing the difference with backup library and the "lost" library:

Terminal command

mdfind "(kMDItemKind == 'Adobe Lightroom Library')"

returns

bad path B9806A02-0000-0000-3000-006B00000000

/Users/Lassi/Pictures/Lightroom/Backups/2013-03-08 0927/Lightroom 4 Catalog.lrcat

/Users/Lassi/Pictures/Lightroom/Backups/2013-02-27 1833/Lightroom 4 Catalog.lrcat

I can usually temporarily fix the index by re-importin the library using

mdimport -d 2 /Users/Lassi/Pictures/Lightroom

But the problem reappears. I've also re-indexed Spotlight nad repaired my drive in OS X Recovery. Nothing helps fof long.
I bumped into this when I started using Everpix photosyncing service. It uses Spotlight to find photos it syncs into its cloud service.

Any suggestions?