[TYPO3-calendar] search [enter] vs. click

[Dirk Steffens]

Hello,

there is a strange behavior with the search-dialogue:

If I fill out the form and type the ENTER-Key - nothing found.
If I fill out the form and click to the question-mark there are the results.

If I erase the question-mark with the web-developer-inspector from firefox, notthing happens after hit ENTER.
Isn't it the proof, that cklick and Enter should be the same?

But there are different results!

Can anyone explain this?

Regards 
Dirk