I blogged here regarding a bug in Magento’s core affecting Catalog Price Rules under promotions. This would effect, for instance, wholesale pricing. Well, Magento confirmed on the bug report that this was fixed in their new release, 188.8.131.52-RC1. I’ve tested this on my staging server and confirm that this is the case. Discount away!
I came across this issue to begin with using the Wildcardbi_RulePriceAttribute module to be able to specify custom prices for specific customer groups (in this case, wholesale/trade pricing) without having to setup an entire new store view for it.