Patusho,
I read somewhere might have been this forum, it looks to me like sunburn, the sun shines in and refracts off the water like a magnifying glass and burns the plant.

I might be wrong but that's my guess.

Rick

Could be sunburn, I had something similar.
Bright sunlight on al cold Vriesea can do that.

Could be snail/slug trouble too.

Sander

Here is a link that might be useful: read this post it explains the sunburn on al cold brom

Yes, but it was underwater. Sunburn can easily occur on a wet leaf surface, but you don't usually see it emerging from way down inside the cup. Same with slugs and snails. I don't know what is causing it. Could be cold, chemical burn, or even mechanical (physical) damage.

It looks like chemical damage to me also...fertlizer, drip from treated lumber or something that the plant didnt like.
Your temp wasnt low enought to hurt it unless it was unprotected from north winds

hi folks for chiming in.

no fertilizer or drip on them of any kind. I also thought it was cold but hdd says it wasn´t that cold but then don´t know for sure about cold winds.

thank you all. Will add protection against wind and cold next winter >=(

How do make those upside down question marks?...I can't even get the ~ over a letter to accent a spanish word.

¿Cómo?

I assume that if you buy a computer in a Spanish speaking country the keyboard will have those, Stan. For the rest of us, there are tricks for typing special characters (see link).

I can't find a way to make a macron (looks like a long vowel sound) over a vowel, though. If anyone knows a way, please let me know, because a lot of Hawaiian words have that.

Here is a link that might be useful: Tip sheet on special characters

your keyboard has something to do with it too....laptops have a different set of codes too I believe

Try "Character Map" in Windows for special characters.