Well since jagex updated sometimes RSBuddy needs to update the client to work properly. In the past update some guys had this issue too and RSBuddy client was updated and it solved the issue. If the client update doesn't solve post in the RSBuddy community forums and they will be able to help you faster.
Try closing out RSBuddy, logging out of rsbuddy site, closing out of any browsers, clearing cookies & cache, restart computer if you want to be entirely sure...
Then start up rsbuddy, login, see if it still happens. Sometimes its a cache issue. If not, then they're preparing for an update and the server is being retarded.