Problems with Winkflash ?

I use winkflash for a long time to print my 6" by 8" photos from my Nikon

D200. I am happy with their quality of prints and price (79 cents per print).

I didn't have any problems before. Recently I placed a few orders to print 6"

by 8" photos (jpeg). I think they have some technical problems.

After 5 days one of my orders (2 prints of the same file: one glossy, one

matte)has been canceled by winkflash because as they say:" file is corrupted".

Then I repeat this order, but place as two sepatate orders: one-glosy print,

one - matte print from the same file. I've received matte print in a two days,

but they say that file for glossy print is corrupted or "may be some other

problem". The file is not corupted because they printed matte photo from this

file. They'll re-send it for print. It was about week ago.

As of today the status of this order is still: PRINTING.

My another order (6" by 8", glossy, 10 jpeg files) which I placed more than

week ago also not ready yet, and it looks like has the same problem.

Do you experience any problems with winkflash? Do they have problems with

prints 6" by 8" on glossy paper?

I love their quality of prints and would like use their service.

Thank you.