Pb with links and bad code generation

Playing creating links in a text in wysiwyg, updating this link or deleting it to recreate it, 2 things occur :

1/ sometimes, I don't know why, it is no more possible to go in "update" link mode, the link window doesn't open anymore for the link.

2/ I succeed to generate very malformed code :

<a href="de saisir</span>>e3work" class="wikilink"></a>

"de saisir" was the texte to put the link on, and e3work is the relative URL to create.

As you see in the HTML code generated 'view in wiki editor mode, there is a problem of syntax first (it is not a valid code generated, and second, it shouldn't be HTML, but wiki syntax like [de saisir>e3work]