OK been doing some testing and found this to be the fix these minor but never the less css issue with TP block admin section, this mod will allow the TP to use the current theme css as well as the TPstyle.css, not breaking up or calling on the default main_block.png!
OK I have a TPstyle.css modification done that should work for those using Tiny portal, they can just upload it to their theme's main folder on each theme they use. I will be including this mod in all my theme from now til TP gets the chance to look into this!
Please find the snap and modified TPstyle.css attacted.
Hope I'm in the correct section!