potty trained 2 yr old wearing diapers at daycare

My 2 1/2 yr. old daughter has been potty trained for 5 months and has recently been wetting her pants at daycare only.  Now she has to wear pull-ups at daycare and she is proud of this fact-refusing to even let the provider know when the pull-up is wet.  She is fine at home and other places, just at daycare.  There have been no major changes since this started two weeks ago.  How do we end this?  I feel by putting my daugher in pull-ups we are feeding into my daughter's wishes of wearing pull-ups at daycare but I know she is doing this on purpose and does not need them. The daycare provider and I are at our wits end.

[RockRose]

Why don't you just ignore this,  and put her in pullups and forget it.  It won't be long before the other kids (who are just now being potty trained themselves) will start to make fun of her for being a baby,  and that will end that.

[hannahandaaron]

She is wearing pull-ups and the other kids are making fun of her.  All this does is make her mad.  She is still content and proud to wear pull-ups.

[RockRose]

Naa,  she's not proud of it.  She's showing them off because she's "sticking it" to somebody - either the day care worker,  or you,  or both.     ignore it,   and she will go back to undies but will probably try to find another way to stick it to whoever she's trying to rebel against - by not eating,  or whatever.  

I think you need to figure out why she's trying to annoy you.