Just tested it while playing Avenger Druid (Chateu Irenicus in BG2):
-casted web -turned myself to spider -got hold by the web
Should not be spiders immune to web (at least own web)?
Might be like that for a purpose though. Any ideas?
EDIT: Putting the properly formatted text in the right form, for sake of clarity, thanks to @Grieg:
Current behavior: Avenger Druid in spider form gets hold by web Expected behavior: Avenger Druid in spider form is immune to web (especially his own)
EDIT 2: Verified the web spell on Kitthix, the summonable spider (from figurine) just now. Seems that even if Kitthix fails save vs. web spell, he's still not held. I guess that makes it a bit pro-bug vs. pro-feature regarding the above.