CB 1.8 and System Cache Plugin of Joomla 1.5

I couldn't register anymore on my site when this plugin was enabled.

Got some error message.

I have read some posts here, but did not find a clear answer or solution.

Anyone willing to share this information?

JustBe wrote: I couldn't register anymore on my site when this plugin was enabled.

Got some error message.

I have read some posts here, but did not find a clear answer or solution.

Anyone willing to share this information?

wow - i couldn't find a clear question so i cannot help and no one else will be able to help either.

Are people suppose to guess the following?

- cb version?
- joomla version?
- got some errors ???

Ok, it seems I can't make the error message repeatable.

I had mentioned some versions in the title. But here a bit more more precise:

cb version 1.8
Joomla 1.5.26


I have some other questions:

1) The field of the Username is black. The other field are more grey. Can I change this color somehow?