PhotoOnWeb is instable for some people and we have decided to not improve it.
We have developed a new software from scratch which can be used an alternative to PhotoOnWeb to upload your web gallery

this program is PhotoLikr
http://www.obviousidea.com/windows-software/photolikr/

and it supports export to Google Picasa, Minus and PhotoOnWeb accounts

You can download it for free and use the same credentials and continue to use your PhotoOnWeb account

PhotoLikr support for now, only 1 template which is the photo wall view ( with interactive thumbnails and full view, compatible with tablet such as iPad. ( we are working on a native iPad version too )