you're welcome!!
This should be
BOLDED somewhere, since php 5.3 and php 5.3.1 have come out and caused probs.. not only with ubbthreads (for now) but other major softwares out there.. joomla, drupal..
they have patched them, but if you google you will see the sad stories...
dunno how strongly to suggest this, but it should be either rectified for 7.5.4.2 or a bulletin to not allow those php versions for now!

i've already mentioned this in 2 or 3 other threads.. disabling deprecated warnings is really not a fix..
i was 'lucky' in that i run a local development server to test stuff out.. and it puked when i upgraded the php...
others may NOT be so lucky

good luck to you!!