some lua errors

[qwertyui]

I keep getting this chat error. It appears soom after i log in and seems to be triggered by mousing over the chatfram, though sometimes it appears completely randomly as well. Usually appears only once per UI reset.
Interface\FrameXML\FloatingChatFrame.lua:1000 bad argument at #1 to 'max' (number expected got nil)
Interface\FrameXML\FloatingChatFrame.lua:1030 bad argument at #2 to 'max' (number expected got nil)

Another more annoying thing is this error i get when i try to add tracking minimap button feature to my minimap artframe. Makes minimap frame unusable (currently using Blizzard frame )
Interface\Addons\RDX\ArtFrames\MinimapButtons.lue:87 (attempt to concatenate field 'mbuttontype' (a nil value)
This bug does not appear if i remove the minimap window from my desktop completely, modify it without it being on the desktop, and then turn it back on.

[Brainn]

if i remember right, the first error is caused by the chat-editbox.
do you use rdx to manage the chatframes ? if yes, try to set the chatmode to classic style in the interface-options -> social.