While loading an application under Ametys with a different default workspace than cms, there are 404 and 500 errors like :

"NetworkError: 404 Introuvable - http://localhost:8080/ebalo/_cms/_cms/resources/fluent/images/ametys/tab.gif"
tab.gif
"NetworkError: 404 Introuvable - http://localhost:8080/ebalo/_cms/_cms/resources/fluent/images/ametys/ribbon.gif"
ribbon.gif
"NetworkError: 500 Erreur Interne de Servlet - http://localhost:8080/ebalo/_cms/plugins/extjs/resources/images/gray/qtip/tip-sprite.gif"
tip-sprite.gif
"NetworkError: 404 Introuvable - http://localhost:8080/ebalo/_cms/_cms/resources/fluent/images/ametys/button.gif"
button.gif
"NetworkError: 500 Erreur Interne de Servlet - http://localhost:8080/ebalo/_cms/plugins/extjs/resources/images/gray/qtip/tip-anchor-sprite.gif"
tip-an...ite.gif
"NetworkError: 500 Erreur Interne de Servlet - http://localhost:8080/ebalo/_cms/plugins/extjs/resources/images/gray/button/btn.gif"
btn.gif
"NetworkError: 404 Introuvable - http://localhost:8080/ebalo/_cms/_cms/resources/fluent/images/ametys/group.gif"
group.gif
"NetworkError: 404 Introuvable - http://localhost:8080/ebalo/_cms/_cms/resources/fluent/images/ametys/controls/button-menu.gif"
button-menu.gif
"NetworkError: 404 Introuvable - http://localhost:8080/ebalo/_cms/_cms/resources/fluent/images/ametys/controls/button-large.gif"
button-large.gif
"NetworkError: 500 Erreur Interne de Servlet - http://localhost:8080/ebalo/_cms/plugins/extjs/resources/images/gray/grid/col-move-bottom.gif"
col-mo...tom.gif
"NetworkError: 500 Erreur Interne de Servlet - http://localhost:8080/ebalo/_cms/plugins/extjs/resources/images/default/dd/drop-no.gif"
drop-no.gif
"NetworkError: 500 Erreur Interne de Servlet - http://localhost:8080/ebalo/_cms/plugins/extjs/resources/images/gray/tabs/tab-close.gif"
tab-close.gif
"NetworkError: 500 Erreur Interne de Servlet - http://localhost:8080/ebalo/_cms/plugins/extjs/resources/images/gray/tabs/tab-strip-bg.gif"
tab-strip-bg.gif
"NetworkError: 500 Erreur Interne de Servlet - http://localhost:8080/ebalo/_cms/plugins/extjs/resources/images/gray/grid/col-move-top.gif"
col-move-top.gif
"NetworkError: 500 Erreur Interne de Servlet - http://localhost:8080/ebalo/_cms/plugins/extjs/resources/images/gray/tabs/tabs-sprite.gif"
tabs-sprite.gif
"NetworkError: 500 Erreur Interne de Servlet - http://localhost:8080/ebalo/_cms/plugins/extjs/resources/images/gray/form/trigger.gif"
trigger.gif
"NetworkError: 500 Erreur Interne de Servlet - http://localhost:8080/ebalo/_cms/plugins/extjs/resources/images/gray/form/date-trigger.gif"
date-trigger.gif
"NetworkError: 500 Erreur Interne de Servlet - http://localhost:8080/ebalo/_cms/plugins/extjs/resources/images/gray/toolbar/bg.gif"
bg.gif
"NetworkError: 500 Erreur Interne de Servlet - http://localhost:8080/ebalo/_cms/plugins/extjs/resources/images/gray/grid/grid3-hrow2.gif"
grid3-hrow2.gif
"NetworkError: 500 Erreur Interne de Servlet - http://localhost:8080/ebalo/_cms/plugins/extjs/resources/images/default/grid/page-first-disabled.gif"
page-f...led.gif
"NetworkError: 500 Erreur Interne de Servlet - http://localhost:8080/ebalo/_cms/plugins/extjs/resources/images/default/grid/page-prev-disabled.gif"
page-p...led.gif
"NetworkError: 500 Erreur Interne de Servlet - http://localhost:8080/ebalo/_cms/plugins/extjs/resources/images/default/grid/grid-split.gif"
grid-split.gif
"NetworkError: 500 Erreur Interne de Servlet - http://localhost:8080/ebalo/_cms/plugins/extjs/resources/images/default/form/text-bg.gif"
text-bg.gif
"NetworkError: 500 Erreur Interne de Servlet - http://localhost:8080/ebalo/_cms/plugins/extjs/resources/images/default/grid/page-next-disabled.gif"
page-n...led.gif
"NetworkError: 500 Erreur Interne de Servlet - http://localhost:8080/ebalo/_cms/plugins/extjs/resources/images/default/grid/page-last-disabled.gif"
page-l...led.gif
"NetworkError: 500 Erreur Interne de Servlet - http://localhost:8080/ebalo/_cms/plugins/extjs/resources/images/gray/grid/refresh.gif"
refresh.gif
"NetworkError: 404 Introuvable - http://localhost:8080/ebalo/_cms/_cms/resources/img/tabs/tabs-focused.gif"
tabs-focused.gif
"NetworkError: 404 Introuvable - http://localhost:8080/ebalo/_cms/plugins/cms/resources/img/search/grid-split.gif"
grid-split.gif
"NetworkError: 404 Introuvable - http://localhost:8080/ebalo/_cms/plugins/cms/resources/img/group-expand-sprite.png"

Only without debug-ui mode.