At Wikipedia's annual conference this week, founder Jimmy Wales warned that . He said the issue was an important one that Wikipedia needed to focus on.

Wales blamed the drop in contributions on Wikipedia's editing guidelines, which many users feel have gotten more complex in recent years. While long-time users are busy in about the minutia of Wikipedia entries, new users are often left in the dark or chastised for not creating articles in the proper format.

The best solution is to make edits easier for new users. Wikipedia also is trying some other fixes.

Among them: Sue Gardner, executive director of the Wikimedia Foundation non-profit that runs Wikipedia, said the organization is working with college professors to have students assigned Wikipedia articles as class work. Users can now also send each other virtual badges in a program called to encourage more participation.

It's unclear how effective these strategies will be, though Wales also was quick to point out that some of the attrition was natural.