[Lazarus] Image caching problems in wiki

[Werner Pamler]

I already posted in the forum, but don't get response there; therefore, 
I give it another try here:

Something is wrong with images in the wiki. I just replaced the 
"DefaultPalette.png" of http://wiki.lazarus.freepascal.org/FPSpreadsheet 
by a new screenshot. But the wiki page still displays the old version. 
Double-clicking the image brings up page 
http://wiki.lazarus.freepascal.org/File:DefaultPalette.png which shows 
the correct version - hence I am sure that the new version is definitely 
uploaded. Moreover, this page contains a hyperlink "full resolution" - 
this shows the wrong image again. Strange...

Is there some caching issue?