First time this happened in either B I or B II:

Bopping along on level 2 in the mine, strength at 170, decided to save, whereupon strength suddenly only 150 and I am desperately overburdened! AACK
What just happened??? Is this a rare bug, or did the system hiccup?

Anyway, I'll have to go back and start again when I still had my full strength. Rats.

You mean your carrying capacity was 170 lbs? Did you switch any equipment or cast any spells that might have worn out?

Hm, I haven't seen this. And my ranger was making use of +strength belts and rings.

So, do you have a Savefile from before - when you had the 170 lbs carrying capacity; and after - when you were down to 150 lbs carrying capacity?

Because, if you have both, and you've confirmed that this is a bug, I'd be tempted to send BW both of these Savefiles...

Thanks for the answers.

I went back, but I soon discovered that the anomaly was just the reverse of what I first reported. The true weight capacity was supposed to be 150 lbs. Probably it was a cosmic ray that knocked some bits around. I just played on, so I won't make any further fuss over that little blip.