I played with may signature a bit and it seems like if I do minor changes
like moving   (and sometimes slashes), like for example this change:

&nbsp;«&nbsp;[[Wikipedysta:Saper|Saper]]<span style="font-size: 70%">&nbsp;//&nbsp;[[Dyskusja Wikipedysty:Saper|dyskusja]]</span>&nbsp;»&nbsp;

to:

&nbsp;«&nbsp;[[Wikipedysta:Saper|Saper]]&nbsp;<span style="font-size: 70%">//&nbsp;[[Dyskusja Wikipedysty:Saper|dyskusja]]</span>&nbsp;»&nbsp;

When I hit save, the preview and the input box contain the previous signature (both input box and preview). It is not just an old cached page, since I have tried signing with ~~~~ on the sandbox and still the old one is used.

Applying the same change second time works.

For some changes (like just adding plain ASCII characters like putting "AA" in front) it works as expected, i.e. changes are saved on hitting "save".

Version: unspecified
Severity: normal
URL: https://secure.wikimedia.org/wikipedia/pl/w/index.php?title=Specjalna:Preferencje