By BBC Scotland's chief sports writer at Ibrox

Of all the dullness on display at Ibrox, Cammy Devlin's five-minute cameo stood apart. A blink-and-you'll-miss-him appearance from a substitute who was supposed to be a leader, a senior man, a guy to nurse Rangers to the endgame with their flimsy 1-0 lead intact. Devlin's night ended with a deserved red card for a ridiculous and entirely needless lunge that fried the brain.

The midfielder was brought to Rangers to add steel, not to contribute to the mental frailties that dogged them on the run-in last season. He was meant to be part of the solution, not at risk of being part of the problem. The red could have put Rangers' win in jeopardy, had Jablonec been up to much, which they weren't. They were organised but unthreatening.

It was a tough watch, though. Rangers in that first half lacked movement and cleverness and X-factor. They were an eyesore. Time and again, defenders looked downfield for a pass to hit only to see their team-mates looking back at them, unmoving and tightly marked. Poor old Emmanuel Fernandez had another difficult experience but there were times when you had sympathy for him.

Derek McInnes recorded his second win in two games, but it was far from straightforward. Rangers have spent fortunes... but badly. Eleven new signings in recent weeks and close to 30 since Andrew Cavenagh's consortium moved in last summer. Their running total of transfer fees long since careered past the £25m mark. Last January, it sped across the £35m barrier and now it's knocking on the door of £50-£60m on new players.